Practice · SīlaVolume FourPart II · Āgama PreceptsPaper 7 of 30

The Uposatha and the Genius of Intermittent Monasticism

中文主題：八關齋戒

Author: Shi Huijing 釋慧鏡

Date: Spring 2026

Version: 1.0

ID: SILA-P07

Abstract

The eight precepts of the aṭṭhaṅga-uposatha — abstention from killing, from taking what is not given, from unchastity, from false speech, from intoxicants, from eating at the wrong time, from dancing and singing and music and shows, garlands and perfumes and cosmetics, and from high and luxurious beds — appear on the canonical surface within a single veramaṇī formula and present to the casual reader as a quantitative arithmetic: five lay precepts with three additional restrictions stacked on top. The present paper, the third of Part II of the SĪLA volume, asks whether this surface arithmetic is the architecture, or whether the eight-factor formula encodes a categorically different design. The argument advanced is that the eight precepts of the uposatha are not a quantitative extension of the five but a "five lay precepts plus three monastic borrowings" borrow-and-return architecture: the lay practitioner, on the lunar observance day, temporarily adopts three monastic restraints (full celibacy upgraded from the lay-side kāmesumicchācāra; abstention from food after midday; and the bodily-and-sensory triad of restraints) and returns them at the appearance of dawn (aruṇuggamana) the following day. The one-day-and-one-night time-bound observance is not a concession to lay weakness but a canonical structural design feature, and the uposatha is — as a canonical category — what the present paper names intermittent monasticism. Four lines of evidence converge on this reading. First, the eight-factor formula exhibits an architectural stability across six independent witnesses spanning two-and-a-half centuries: AN 8.41 Saṅkhitta-uposatha-sutta in Pāli; Madhyama-āgama 202 Pratigraha-sūtra (trans. Saṅghadeva 僧伽提婆, Eastern Jin Lóng-ān, 397–398 CE); Ekottara-āgama fascicle 16 Sānzhāi-pǐn; Zhāi-jīng (T0087, trans. Zhi Qian 支謙, Wu 3rd century — attribution corrected from the traditional ascription to An Shigao per the byline at CBETA T01n0087); Upāsika-uposatha-sūtra (T0088, anonymous, appended to the Sòng catalogue, linguistically dated to the 2nd–3rd century after Nattier 2008); and Aṣṭāṅga-uposatha-sūtra (T0089, trans. Juqu Jingsheng 沮渠京聲, Liu Song, 5th century). Across all six the content of the eight precepts is fully stable; only the position of the abstention from eating at the wrong time is permuted between the sixth and the last factor; no witness adds, removes, or modifies any precept. Second, AN 3.70 Uposatha-sutta supplies the canonical-internal philological key in its three-typology of uposatha (gopālaka-uposatha, the cowherd's; nigaṇṭha-uposatha, the Jain's; ariy-uposatha, the noble one's) and in the ariy-uposatha's central reception formula imañca rattiṁ imañca divasaṁ arahataṁ anukaromi · iminā ca me aṅgena uposatho upavuttho bhavissati ("for this day and this night I imitate the Arahants; by this factor the uposatha will have been observed"): the verb anukaromi is a first-person-singular active indicative, with the lay practitioner herself as the grammatical subject and arahataṁ (genitive plural, "of the Arahants") as the object of imitation. Third, the Abhidharma-samuccaya-vyākhyā (T1606, trans. Xuanzang 玄奘, 646–648 CE) at fascicle 7 places the uposatha within the eight categories of pratimokṣa-restraint as the ahorātrika-saṃvara — the day-and-night restraint, the near-dwelling restraint (近住律儀) — sitting architecturally between the seven lay-monastic categories, and supplies the doctrinal justification "but the day-and-night near-dwelling restraint is prescribed in order that they may train gradually together" (但制日夜近住律儀,為令漸漸俱修學故): the uposatha's propaedeutic function as the bridge from lay to monastic ethical formation. Fourth, the Upāsaka-śīla-sūtra (T1488, trans. Dharmakṣema 曇無讖, Northern Liáng, Xuán-shǐ 15 / 426 CE) at fascicle 7 poses the architectural question to which the borrow-and-return reading supplies the functional answer: "for what reason are the five precepts received for the duration of life, but the eight-precept fasting observance for one day and one night?" (何緣五戒盡形壽受,八戒齋法一日一夜?), together with the time-bound's canonical formulation "when dawn appears, then [the precepts] are released" (明相出時,是時則失). On the commentarial side, Dàoxuān 道宣 (Tang 7th century) at the Sifenlü-xingshichao (T1804) fascicle 下, section "Three Modes of the Eight-Precept Procedure" (三明八戒法, T40 p.140b), codifies the uposatha reception into three modes — including a self-administered "mental-utterance" option (心念口言) with no Pāli parallel, a Chinese-vinaya innovation that architecturally maximises lay accessibility. Zhiyi 智顗 (Sui 6th century) at the Mohe-zhiguan (T1911) contains zero references to the uposatha, an architecturally significant absence that registers the Chinese disciplinary division of labour between Tiantai's perfect-and-sudden precept programme and the vinaya school's lay-precept oversight. The propaedeutic function of the one-day-and-one-night observance prefigures the sīla-gandha social-field phenomenon developed in P08 and the SĪLA → SAMĀDHI developmental gradient consummated in P24. Ten Pāli loci directly relevant to the present paper's argument are absent from the present author's working corpus and are accordingly cited by PTS reference only, without verbatim Pāli text, in line with the firewall carried over from P04, P05, and P06.

I. The Problem

The preceding paper of the present volume's Part II (P06, The Five Precepts and Their Canonical Scope) advanced a categorical claim about the pañca-sīla: the five precepts are not a homogeneous list of lay-side prohibitions but a set of five constitutive path-elements, each carrying a different canonical scope under a single reception ritual — what was named there the "same ritual, different scope" architecture.¹ But the structure of sīla in the lay practitioner's developmental trajectory is not exhausted by the standing five precepts. At periodic intervals during the lunar month — on the eighth, the fourteenth, and the fifteenth days, or, in the cross-traditional variant attested in T1442 Mūla-sarvāstivāda-vinaya, on the four quarterly observance days (eighth, fifteenth, twenty-third, and month-end), and in the Mahāprajñāpāramitā-śāstra's extension calendar at T1509 fascicle 13, on the six monthly observance days — the lay practitioner adopts a different formula: the aṭṭhaṅga-uposatha, the eight-factor uposatha, in which the standing five precepts are joined by three further restraints. The eight precepts appear on the surface within a single veramaṇī formula and read at first glance as a quantitative arithmetic: five plus three equals eight. The central question of the present paper is whether this arithmetic is the architecture: are the eight precepts of the uposatha a quantitative extension of the five, or do they encode a categorically different structural design? The answer to this question is supplied within the canon itself by AN 3.70 Uposatha-sutta, in a passage of striking architectural precision. The discourse opens with a three-fold typology of uposatha observance. The first is the gopālaka-uposatha — the cowherd's uposatha — in which the lay practitioner outwardly observes the precepts but inwardly attends to the consumption to come, as a cowherd attending the herd in pasture attends to the richer grass and the better water on tomorrow's route: formal observance with the mind on tomorrow's pasture. The second is the nigaṇṭha-uposatha — the Jain's uposatha — in which abstention from killing is configured ritualistically by spatial demarcation: one abstains from killing living beings within a delimited radius, but the precept does not extend beyond it; the formal scope of abstention is bound to a perimeter rather than to a categorical commitment, and the observance is therefore ritualistic rather than transformative. The third is the ariy-uposatha — the noble one's uposatha — in which the practitioner undertakes the six-fold recollection prelude (cha anussatiyo: of the Buddha, the Dhamma, the Saṅgha, sīla, cāga, and devatā), the eight-fold precept formula, and the central reception line imañca rattiṁ imañca divasaṁ arahataṁ anukaromi · iminā ca me aṅgena uposatho upavuttho bhavissati — "for this day and this night I imitate the Arahants; by this factor the uposatha will have been observed."² The canonical status of the formula arahataṁ anukaromi — "I imitate the Arahants" — deserves particular emphasis. It is not a later commentarial gloss imposed on the suttas, nor is it a monastic exhortation directed at the laity, nor is it a programmatic ideal supplied by the modern interpreter. It is the canonical reception line of the ariy-uposatha itself, embedded within the sutta's own articulation of what the noble disciple's uposatha is. Its grammar is decisive: anukaromi is a first-person-singular active indicative, taking the lay practitioner as its grammatical subject; arahataṁ is a genitive plural, "of the Arahants," supplying the object of imitation. The lay practitioner — herself, in the first person, in the act of undertaking the uposatha — declares her imitation of the Arahants for the duration of the day and the night. The formula is the canon's own emic structural description of what uposatha observance is in the noble-disciple register: the periodic, time-bound adoption by the lay practitioner of the Arahant's mode of dwelling. Read in this canonical light, the eight precepts of the uposatha decompose into a borrow-and-return architecture. The first five precepts retain the surface form of the lay pañca-sīla, but at the third precept a decisive categorical shift occurs. The lay third precept — kāmesumicchācārā veramaṇī, abstention from sexual misconduct — is keyed in its lay scope to behaviour outside the licit marital relation. The uposatha third precept — abrahmacariyā veramaṇī, abstention from unchastity — is keyed instead to the monastic-grade categorical commitment brahmacārī ārācārī virato methunā gāmadhammā: "chaste, dwelling apart, refraining from the vulgar practice of sexual intercourse," in which methuna (sexual intercourse) under the rubric of gāma-dhamma (the "village practice") names all sexual conduct without internal distinction. The uposatha third precept is not a strengthening of the lay third precept but a borrowing of the monastic third precept in its place. The latter three precepts — abstention from eating at the wrong time, abstention from high and luxurious beds, and the long-compound seventh precept of abstention from dancing and singing and music and shows, from garlands and perfumes and cosmetics, from jewellery and ornaments — are not lay precepts at all; they are direct borrowings from the monastic restraint repertoire. The lay practitioner on the uposatha day adopts these monastic restraints for one day and one night and returns them at dawn. The temporal terminator is the aruṇuggamana, the "dawn appearance," whose Chinese canonical formulation at T1488 fascicle 7 reads "when dawn appears, then [the precepts] are released" (明相出時,是時則失): the borrowed restraints are released, the standing five-precept discipline resumes, and the uposatha is concluded. The architecture is what the present paper names intermittent monasticism: a canonical design in which the lay practitioner periodically adopts the Arahant's mode of dwelling, samples it for one day and one night, and returns it, without the permanent renunciative commitment that the going-forth (pabbajjā) requires. This architectural reading receives further confirmation in the philological record. The eight-factor formula is attested across six independent witnesses spanning approximately two-and-a-half centuries of transmission and translation: AN 8.41 Saṅkhitta-uposatha-sutta (Pāli, the Mahāsaṅgīti CC0 edition); Madhyama-āgama 202 Pratigraha-sūtra (T0026 fascicle 55, trans. Saṅghadeva, Eastern Jin Lóng-ān 397–398 CE);³ Ekottara-āgama fascicle 16 Sānzhāi-pǐn (T0125, Gautama Saṅghadeva and the Buddhayaśas 佛陀耶舍 circle, 4th–5th centuries);⁴ Zhāi-jīng (T0087, trans. Zhi Qian, Wu, 3rd century — attribution corrected from the traditional ascription to An Shigao 安世高 per the byline at CBETA T01n0087);⁵ Upāsika-uposatha-sūtra (T0088, anonymous, appended to the Sòng catalogue, linguistically dated to the 2nd–3rd century after Nattier 2008);⁶ and Aṣṭāṅga-uposatha-sūtra (T0089, trans. Juqu Jingsheng, Liu Song, 5th century).⁷ Across all six the content of the eight precepts is fully stable; the only variation is in the position of vikāla-bhojanā veramaṇī (the abstention from eating at the wrong time), which occurs either as the sixth or as the last of the eight; no witness adds, removes, or substantively modifies any precept. This 250-year, six-witness architectural stability across two canonical-language traditions and multiple independent translation-courts is itself the strongest philological argument that the eight-factor formula is a canonical structural design, not an occasional liturgical assembly.⁸ The present paper's architectural thesis is grounded, accordingly, in a four-axis evidence chain: (1) the six-witness cross-recension stability of the eight-factor formula across two-and-a-half centuries; (2) the canonical-internal arahataṁ anukaromi formula at AN 3.70, with its grammatical decisiveness in placing the lay practitioner as subject and the Arahants as object of imitation; (3) the abhidharmic doctrinal articulation at Abhidharma-samuccaya-vyākhyā fascicle 7, which classifies the uposatha as the ahorātrika-saṃvara, the eighth of the eight pratimokṣa-categories, and supplies the propaedeutic justification "in order that they may train gradually together"; and (4) the explicit thesis question posed in the Chinese Mahāyāna lay-precept stratum at Upāsaka-śīla-sūtra fascicle 7 — "for what reason are the five precepts received for the duration of life, but the eight-precept fasting observance for one day and one night?" The four axes intersect at a single architectural conclusion. The uposatha is the canon's own design of a periodic, time-bound, lay-practitioner adoption of the Arahant's mode of dwelling, and the one-day-and-one-night time-bound is a canonical structural design feature rather than a concessive accommodation. ---

II. Canonical Sources

2.1 The Pāli axis: the three-typology, the eight-factor formula, and the dual register of the benefits of sīla

The Pāli anchor of the present paper is AN 3.70 Uposatha-sutta, which supplies, in a single discourse, the three-typological discrimination of uposatha observances, the six-fold recollection prelude of the ariy-uposatha, and the central reception formula imañca rattiṁ imañca divasaṁ arahataṁ anukaromi · iminā ca me aṅgena uposatho upavuttho bhavissati.² The three-typology is not a rhetorical contrast but a categorical discrimination of what counts as uposatha at all. The cowherd's uposatha (gopālaka-uposatha) fails not by lapse of the outward observance — the formal precepts are kept — but by the internal disposition of the mind, which attends to consumption rather than to renunciation. The Jain's uposatha (nigaṇṭha-uposatha) fails not by lapse of the outward observance — the formal abstention from killing is performed — but by the spatial ritualisation of the precept, which configures abstention as a geographical perimeter rather than a categorical commitment. Only the noble one's uposatha, in which the six-fold recollection prelude, the eight-factor precepts, and the arahataṁ anukaromi emulation framework converge as a tripartite whole, qualifies as the noble disciple's observance. The discourse's three-typological discrimination is therefore not merely a taxonomy but the canon's own internal answer to the question "what makes an uposatha a true uposatha." This three-typology functions as the structural foundation of §III.3 below. AN 8.41 Saṅkhitta-uposatha-sutta supplies the eight-factor formula in its full canonical articulation: abstention from killing, from taking what is not given, from unchastity (with the categorical upgrade to brahmacārī ārācārī virato methunā gāmadhammā), from false speech, from intoxicants, from eating at the wrong time (vikāla-bhojanā), from dancing and singing and music and shows, from garlands and perfumes and cosmetics, from jewellery and ornaments (the long-compound seventh precept nacca-gīta-vādita-visūkadassana-mālā-gandha-vilepana-dhāraṇa-maṇḍana-vibhūsana-ṭṭhānā), and from high and luxurious beds (uccā-sayana-mahā-sayanā).⁹ Two philological clarifications concerning the immediately adjacent suttas merit notice. First, AN 8.42 Vitthata-uposatha-sutta and AN 8.43 Visākhā-uposatha-sutta are not two further independent eight-factor formulae; both abbreviate the eight-factor content with the elision marker …pe… and then append, respectively, the comparison with the sixteen great realms together with a six-tiered cosmological articulation (AN 8.42), and an extended instruction directed to the laywoman Visākhā (AN 8.43); the eight-factor content of both is identical to AN 8.41.⁹ Second, AN 9.18 Navaṅguposatha-sutta records a nine-factor variant — the eight precepts together with a ninth, mindful loving-kindness directed in all directions; this discourse is absent from the present author's working corpus and is cited by PTS reference (PTS AN iv 388) only.¹⁰ The nine-factor variant is documented for completeness; the eight-factor formula remains the canonical centre, as the philological consensus across the six witnesses confirms. The canonical articulation of the benefits of sīla is given in two complementary registers within the Pāli axis. AN 5.213 Sīlasutta sets out the worldly-result register through its 5+5 enumeration: the five drawbacks of breach of precepts (dissipation of wealth, evil reputation, loss of confidence in social gatherings, confused death, and rebirth in a state of woe) and their five corresponding benefits in the opposite ethical state (prosperity, good reputation, confidence in gatherings, unconfused death, and rebirth in a heavenly state).¹¹ This enumeration is the canonical articulation of sīla's consequences in the worldly result-register, both in the present life and at the time of death. AN 11.1 Kimatthiyasutta sets out, in complementary register, the soteriological-trajectory expansion of sīla's benefits as an eleven-link developmental chain: sīla → avippaṭisāra → pāmojja → pīti → passaddhi → sukha → samādhi → yathābhūta-ñāṇadassana → nibbidā → virāga → vimuttiñāṇadassana — ethical conduct, non-remorse, gladness, rapture, tranquillity, bliss, concentration, knowledge and vision of things as they are, disenchantment, dispassion, and the knowledge and vision of liberation.¹² The first seven links of this chain — from sīla through samādhi — articulate the developmental gradient by which ethical conduct unfolds naturally into concentration. The two-fold register matters specifically for the uposatha. The day-and-night observance's immediate fruits fall under the AN 5.213 worldly-result register; the cumulative trajectory of repeated periodic observance unfolds along the AN 11.1 soteriological chain, with the lay practitioner experientially sampling the sīla → samādhi gradient at each observance day. The full eleven-link unpacking is reserved for the SĪLA → SAMĀDHI handoff at P24; the present paper cites only the first seven links as the canonical baseline for the lay-side rehearsal. A third Pāli register supplements the dual benefit-frame. AN 4.245 Sikkhānisaṃsa-sutta articulates the sikkhā / sikkhāpada register — training and training-rule — through the formula "this celibate life is led for the benefit of training, with wisdom as its summit, with liberation as its core, with mindfulness as its sovereign" (sikkhānisaṁsam idaṁ brahmacariyaṁ vussati paññuttaraṁ vimuttisāraṁ satādhipateyyaṁ).¹³ Sikkhā denotes the dynamic register of cultivation, distinct from the static register of sīla as established ethical character. The uposatha's reception formula names its eight constituents as aṭṭhaṅga-sikkhāpada — eight training-rules — and the choice of register itself carries the doctrinal content of "graduated cultivation," consonant with the propaedeutic function articulated at T1606.

2.2 The Chinese axis: four independent translations and the strongest Āgama-side anchor

The Chinese-side anchor of the present paper is Madhyama-āgama 202 Pratigraha-sūtra (持齋經, MA 202 at T0026 fascicle 55), translated by Saṅghadeva 僧伽提婆 in the Lóng-ān reign-era of the Eastern Jin (397–398 CE).³ The discourse records a laywoman undertaking the eight-factor observance and the Buddha articulating the reception formula in the Chinese-side counterpart of arahataṁ anukaromi: "for this reason, laywoman, having fully undertaken the eight-factor fast, on the day of the eight-factor fast you are like an Arahant, having of yourself crossed over birth and death. I likewise, on this present day and night, also practise the precepts, also practise the fast." The Chinese-side phrase "on this present day and night, like an Arahant" corresponds, by independent transmission within the same late-fourth-century horizon, to the Pāli formula arahataṁ anukaromi. The convergence of the Pāli and Chinese transmissions at the same canonical formula, in independent translation contexts, supplies the strongest single piece of evidence for the cross-traditional architectural stability of the emulation framework.⁸ Four further independent Chinese translations of dedicated uposatha sūtras are extant, three of them from the early translation period. The earliest extant Chinese translation of a dedicated uposatha sūtra is Zhāi-jīng (T0087), translated by Zhi Qian 支謙 in the third century during the Wu kingdom period. A philological correction is required at this point. The traditional Chinese catalogue tradition long ascribed T0087 to An Shigao of the second-century Later Han, but the byline at the head of the text in the CBETA Electronic Tripiṭaka (T01n0087) explicitly identifies the translator as Zhi Qian; the present paper follows the CBETA byline-ascription, treating the Zhi Qian attribution as the philologically supported one.⁵ The discourse contains a three-fold classification of fasting observances — "cowherd's fast" (牧牛齋), "Nigaṇṭha's fast" (尼揵齋), and "Buddha-Dharma fast" (佛法齋) — structurally identical to the Pāli AN 3.70 three-typology. T0087 is the principal Āgama-side anchor for the three-typological discrimination on the Chinese side, and predates the Saṅghadeva translation of MA 202 by approximately one hundred and fifty years. Upāsika-uposatha-sūtra (T0088, 優陂夷墮舍迦經) is anonymous; the text is appended to the Sòng catalogue (Sēng Yòu 僧祐's Chū-sānzàng-jì-jí) but neither the translation-court nor the translator is reconstructible. Linguistic dating after Nattier 2008 places the translation in the 2nd–3rd-century early-translation horizon, but the precise date and the translator remain unrecoverable.⁶ Aṣṭāṅga-uposatha-sūtra (T0089, 八關齋經) was translated by Juqu Jingsheng 沮渠京聲 in the Liu Song period of the 5th century, and supplies the most complete reception-formula articulation among the independent Chinese translations: each precept is undertaken in the form "Just as the Arahants, for the whole of their lives, do not kill living beings — so I, named so-and-so, for one day and one night will not kill living beings, nor incite others to kill."⁷ The phrase "just as the Arahants" (猶如阿羅漢) names the Arahant directly as the object of emulation, and is therefore the strongest sentence-level Chinese-side correspondence to the Pāli arahataṁ anukaromi. Alongside it, Zhi Qian's Zhāi-jīng (T0087) opens each of its eight precepts with "for the full day and night, hold the mind like a True Person" (盡一日一夜持，心如真人): 真人 ("True Person") is one of the principal Chinese renderings of arahant in the Han–Six-Dynasties translation tradition. The Pāli and the Chinese transmissions converge on the same architectural formula in independent witnesses. Further Āgama-side evidence includes Ekottara-āgama fascicle 16 Sānzhāi-pǐn (T0125, the "Three Observance-Days Chapter"), which supplies the three observance-day calendar of the eighth, fourteenth, and fifteenth lunar days;⁴ Dīrgha-āgama fascicle 20 Lokaprajñapti-sūtra (T0001 Shìjì-jīng), trans. Buddhayaśas and Zhu Fonian 竺佛念, which records the three observance-day table within a cosmological frame articulating the Four Heavenly Kings' inspection of human conduct;⁴ and Saṃyukta-āgama fascicle 40 and fascicle 50 sūtra 1325 (T0099, trans. Guṇabhadra 求那跋陀羅), which provide, respectively, Indra's verses praising the uposatha and a cautionary narrative of breach of the observance.¹⁴ One philological clarification is required: Dīrgha-āgama fascicle 11 Sigāla-sūtra (DA 16), occasionally cited as a Chinese-side support for the eight-precept uposatha, contains only the six wealth-loss + six intoxicant-failings articulations and does not contain the eight-factor reception formula. DA 16 is the Āgama-side anchor for the intoxicant precept of P06's exposition; it is not a source for the uposatha, the Dīrgha-āgama-side uposatha anchor being instead DA fascicle 20 Lokaprajñapti-sūtra. The present paper preserves the distinction explicit in P06.¹⁵

2.3 Cross-recension architectural stability: six witnesses, 250 years, eight precepts stable

Synthesising the Pāli and Chinese witnesses — AN 8.41 (Pāli); MA 202 (Eastern Jin 397–398 CE); Ekottara-āgama fascicle 16 (Eastern Jin 4th–5th centuries); T0087 (Wu 3rd century); T0088 (early translation period 2nd–3rd centuries); and T0089 (Liu Song 5th century) — the eight-factor formula's content is fully stable across the six witnesses; the only divergence is in the position of vikāla-bhojanā veramaṇī, which appears as the sixth or as the last of the eight; no witness adds, removes, or substantively modifies any of the eight precepts. The philological finding is of particular weight. From the 2nd to the 5th century, across the Pāli and the Chinese transmissions, across multiple independent translation-courts (Zhi Qian's southern China, Saṅghadeva's Xiangyang and Jiangnan, Juqu Jingsheng's Liu Song / Gaochang), the eight-factor formula maintains its architectural identity, with variation restricted to the order of two factors. This 250-year, six-witness architectural stability is itself the strongest philological argument that the eight-factor uposatha formula is canonical structural design rather than occasional liturgical assembly.⁸ A note on citation discipline is required before proceeding. The present paper engages, at §III and §V, with passages of Buddhaghosa's Visuddhimagga concerning sīla and its recollection (chapter I Sīla-niddesa and chapter VII §4 Sīlānussati-kathā). Chapter I has been confirmed across multiple checks to be a structural absence from the present author's working corpus of Pāli texts; chapter VII §4, though present in the working corpus, carries a licensing setting (GRETIL CC-BY-SA) that does not permit verbatim quotation. The present paper accordingly cites the Visuddhimagga in paraphrase at the chapter-section level, without paragraph numbers, pending print collation against Ñāṇamoli's translation (BPS 4th edition).¹⁶ By the same discipline, nine further Pāli loci of relevance — AN 9.18 Navaṅguposatha-sutta, AN 8.44 Vāseṭṭha-sutta, AN 8.45 Bojjhā-sutta, AN 7.50 Methuna-sutta, AN 5.176 Pīti-sutta, AN 5.179 Gihī-sutta, Khuddakapāṭha 2 Dasa-sikkhāpada, Khuddakapāṭha 5 Maṅgala-sutta, AN 4.61–62, AN 10.46 Sakkasutta, and Sutta Nipāta 2.14 Dhammika-sutta — are absent from the working corpus and are cited by PTS reference only, without verbatim Pāli text.¹⁰ ---

III. The Eight-Factor Architecture: Five Lay Precepts and Three Monastic Borrowings

3.1 The first five precepts: the categorical upgrade at the third

The first five precepts of the aṭṭhaṅga-uposatha correspond, on the surface, to the five lay precepts of the standing pañca-sīla. But the apparent surface-correspondence conceals a decisive categorical shift located at the third precept. The lay third precept is kāmesumicchācārā veramaṇī — abstention from sexual misconduct — whose canonical scope, as P06 §3.3 set out at length, is keyed to behaviour outside the licit marital relation: sexual conduct with a partner who is not one's spouse counts as breach; sexual conduct within the licit marital relation does not fall under the precept's prohibition. The uposatha third precept is by contrast abrahmacariyā veramaṇī — abstention from unchastity — whose canonical reception line is brahmacārī ārācārī virato methunā gāmadhammā: "chaste, dwelling apart, refraining from the vulgar practice of sexual intercourse."⁹ The decisive lexical term is methuna (sexual intercourse) under the rubric of gāma-dhamma (the "village practice" or "vulgar practice"), which functions in the canonical idiom as a categorical designation for all sexual conduct without any internal distinction between licit and illicit forms. The uposatha third precept, on the day of observance, brings the lay practitioner's licit marital sexual conduct also under the scope of the precept. This is a categorical upgrade, not a quantitative extension: the social register of brahmacārī, in the canonical idiom, is the principal lexical marker of the monastic identity. The architectural significance of this upgrade is decisive for the central thesis of the present paper. Were the uposatha third precept a quantitative extension of the lay third precept (a "stronger sexual-misconduct precept"), the "5 + 3" arithmetic reading would be correct. But the uposatha third precept does not extend the canonical scope of kāmesumicchācāra; it substitutes the monastic-grade brahmacariya scope in its place. The displacement is categorical, not gradational. The remaining four of the first five precepts — abstention from killing, from taking what is not given, from false speech, and from intoxicants — retain their lay canonical scope on the uposatha day, identical with their scope under the standing pañca-sīla discipline. The asymmetry is itself the philological evidence: only at the third precept does the canonical scope shift from lay to monastic. The first five precepts of the uposatha are therefore not a "strengthened five-precept set" but a "four lay precepts retained plus one monastic precept borrowed in place of the corresponding lay precept" — the borrow-and-return mechanism already operating within the first five precepts. The reading clarifies two persistent misreadings of the uposatha third precept. The first misreading interprets the upgrade as a tightening of the kāmesumicchācāra scope (a "stricter sexual-misconduct precept for the observance day"), neglecting the categorical force of the term brahmacārī as a monastic-identity marker. The second misreading interprets the upgrade as the lay practitioner's "becoming a monastic for a day," in the sense of taking on the full monastic discipline; but the eight-factor uposatha is not the complete monastic pātimokkha, which comprises 227 rules in the Theravāda recension or 250 in the Dharmaguptaka-vinaya tradition. What the lay practitioner adopts on the uposatha day is selective and time-bound: not a complete monastic discipline, but eight specific restraints, three of which are categorically monastic in scope. The first misreading underestimates the categorical force of the upgrade; the second misreading overestimates the completeness of the adoption. The architectural reading that the present paper advances is more precise: the uposatha is a selective and time-bound monastic borrowing, neither a strengthened lay discipline nor a complete monastic ordination.

3.2 The latter three precepts: selective borrowing from the monastic restraint repertoire

The three precepts that distinguish the aṭṭhaṅga-uposatha from the standing pañca-sīla — abstention from eating at the wrong time (vikāla-bhojanā veramaṇī), abstention from high and luxurious beds (uccā-sayana-mahā-sayanā veramaṇī), and the long-compound seventh precept of abstention from dancing and singing and music and shows, garlands and perfumes and cosmetics, jewellery and ornaments (nacca-gīta-vādita-visūkadassana-mālā-gandha-vilepana-dhāraṇa-maṇḍana-vibhūsana-ṭṭhānā veramaṇī) — are taken in their entirety from the monastic restraint repertoire.⁹ The selection is not arbitrary. Within the novice dasa-sikkhāpada and the monastic pātimokkha, these three correspond respectively to the sixth, the integrated seventh-and-eighth, and the integrated ninth-and-tenth restraints in the standard novice precept enumeration. The selection covers three specific monastic-life dimensions that interface most directly with lay daily life and are therefore the natural site for lay-side periodic sampling. The sixth precept, abstention from eating at the wrong time. The monastic discipline structures the day around one meal taken before noon and abstention from food after midday. The restraint directly addresses the lay practitioner's choice of when to eat. The lay practitioner who undertakes the uposatha takes no further food after midday, for one day and one night, and thereby samples the basic dietary structure of monastic life. The seventh precept, the long-compound abstention from entertainments and adornments. The monastic discipline forbids participation in worldly entertainment (dance, song, instrumental music, theatrical spectacles), the wearing of garlands and perfumes, and bodily ornamentation. The restraint addresses the lay practitioner's social life and outward self-presentation. The lay practitioner on the uposatha day abstains from entertainment, perfume, and ornament, sampling the monastic withdrawal from the public sphere of social-aesthetic display. The eighth precept (or the eight-precept set's terminal precept), abstention from high and luxurious beds. The monastic discipline forbids lavish furnishings of repose. The restraint addresses the lay practitioner's material conditions of how to rest. The lay practitioner on the uposatha day sleeps on a low bed or on the floor, sampling the material simplicity of the monastic dwelling. The three precepts together sample three specific dimensions of monastic daily life — diet, social-aesthetic presentation, and material conditions of repose — through a minimal set of restraints covering the most lay-accessible monastic interfaces. The selection is the canon's minimum sampling of the monastic life-form: a small number of restraints covering the largest accessible cross-section. The eight-factor uposatha is therefore the two-layer architecture of (a) the standing five precepts with one categorical upgrade at the third precept, and (b) the selective borrowing of three monastic restraints across the three principal monastic-life dimensions — and not the one-layer architecture of "five precepts with three additional restraints" that the surface arithmetic would suggest. The two-layer architecture is the borrow-and-return architecture.

3.3 The arahataṁ anukaromi formula: the canonical-internal articulation of intermittent monasticism

The exposition of §§3.1 and 3.2 has set out the eight precepts as a "five lay precepts plus three monastic borrowings" architecture in its philological articulation. The architectural reading requires, however, a canonical-internal warrant — an explicit statement, in the canon's own voice, that the lay practitioner on the uposatha day undertakes the Arahant's mode of dwelling. This warrant is supplied by the reception formula of AN 3.70's ariy-uposatha: imañca rattiṁ imañca divasaṁ arahataṁ anukaromi · iminā ca me aṅgena uposatho upavuttho bhavissati — "for this day and this night I imitate the Arahants; by this factor the uposatha will have been observed."² The canonical weight of this formula deserves articulation at two levels. The first is the grammatical level. The verb anukaromi is a first-person-singular active indicative; the subject is the lay practitioner herself, in the act of undertaking the observance. The object of imitation is supplied by arahataṁ, the genitive plural "of the Arahants" — the Arahants as the canonical category of the liberated, the noblest taxonomic identity in the Pāli canonical typology. The grammatical structure of the formula directly aligns the lay practitioner's first-person undertaking with the Arahants' mode of dwelling. The alignment is not metaphorical, not comparative, not aspirational; it is grammatical, and grammatical at the heart of the reception line itself. The formula does not say "may I become like the Arahants" or "as if I were an Arahant" or "in remembrance of the Arahants" — it says "I imitate the Arahants," in the active indicative, for the duration of this day and this night. The second is the level of canonical placement. The formula is not located within the post-canonical commentarial layer or within a hermeneutical reading imposed on the text; it stands within the reception formula of the ariy-uposatha itself, embedded in the canonical articulation of what the noble disciple's uposatha is. The raison d'être of the lay practitioner's uposatha is not, on this canonical articulation, simply the temporary intensification of restraint or the accumulation of merit; it is the alignment of the lay practitioner's conduct, for the duration of one day and one night, with the Arahant's mode of dwelling. The significance of this alignment becomes clearer against the three-typological backdrop of AN 3.70. The cowherd's uposatha fails because the formal observance is undertaken with the mind on tomorrow's pasture: arahataṁ anukaromi is absent as an internal disposition, and the observance is reduced to outward form. The Jain's uposatha fails because abstention is ritualised by spatial boundary: the categorical commitment of the Arahant's mode of dwelling is reduced to a geographical perimeter, and the observance is reduced to ritualistic precision. Only the noble one's uposatha, in which the six-fold recollection prelude, the eight-factor precepts, and the arahataṁ anukaromi internal alignment converge as a tripartite whole, qualifies as the canonical noble-disciple observance. The eight-factor precepts in this canonical context are not formal restraints under a quantitative description but the practical articulation of the Arahant's mode of dwelling across the dimensions of diet, sexual conduct, social-aesthetic display, and material conditions — the four sampled dimensions of intermittent monasticism. The reading clarifies, finally, that "intermittent monasticism" is not an extrinsic interpretive category imposed on the canonical material from outside; it is the direct philological articulation of what AN 3.70 says the ariy-uposatha is. The lay practitioner on the uposatha day enacts, for one day and one night, the periodic emulation of the Arahant's mode of dwelling. The uposatha is, in this canonical articulation, the Arahant's mode of dwelling in its lay-side periodic return.

3.4 The one-day-and-one-night time-bound: canonical structural design

The remaining question concerns the time-bound of the observance: why is the aṭṭhaṅga-uposatha limited to one day and one night, terminating at dawn the following morning? The question is not a modern interpretive overlay; it is posed explicitly within the canonical literature itself, at the Mahāyāna lay-precept stratum of Upāsaka-śīla-sūtra fascicle 7 (T1488, Dharmakṣema, Northern Liáng, Xuán-shǐ 15 / 426 CE): "for what reason are the five precepts received for the duration of life, but the eight-precept fasting observance for one day and one night?" (何緣五戒盡形壽受,八戒齋法一日一夜?).¹⁷ The same fascicle supplies the time-bound's canonical formulation: "when dawn appears, then [the precepts] are released" (明相出時,是時則失) — at the aruṇuggamana, the canonical dawn-appearance, the borrowed restraints are released and the standing five-precept discipline resumes. The time-bound is therefore not a matter of pastoral practice or local custom but a canonical structural feature of the observance. The doctrinal articulation of why this time-bound is structurally designed (rather than concessively granted) is supplied at the abhidharmic stratum. Sthiramati's Abhidharma-samuccaya-vyākhyā (T1606), translated by Xuanzang in 646–648 CE, at fascicle 7, places the uposatha within the eight categories of pratimokṣa-saṃvara (the eight pratimokṣa-restraint categories) — bhikṣu, bhikṣuṇī, sikkhamānā, sāmaṇera, sāmaṇerī, upāsaka, upāsikā, and as the eighth category the ahorātrika-saṃvara, the day-and-night restraint or near-dwelling restraint (近住律儀). The category is named by its time-bound: ahorātrika renders, in Sanskrit, "of the day and the night"; the Chinese equivalent 近住律儀 carries the gloss of "dwelling near [the monastic life]." The architectural placement is decisive: the uposatha sits as the eighth of eight pratimokṣa-categories, between the seven lay-monastic ordination categories — neither a pure lay-restraint nor a pure monastic-ordination category, but the canonical category of "dwelling near the monastic life for the day and the night." The same fascicle then supplies the doctrinal justification: "but the day-and-night near-dwelling restraint is prescribed in order that they may train gradually together" (但制日夜近住律儀,為令漸漸俱修學故).¹⁸ The phrase 漸漸俱修學 — "training gradually together" — articulates the uposatha's propaedeutic function as the architectural bridge from lay to monastic ethical formation. The lay practitioner cannot, without warrant, undertake the permanent commitments of the going-forth; but the lay practitioner can, on the periodic observance day, sample the Arahant's mode of dwelling without that permanent commitment. The sampling is itself the gradual training; the periodic return is the canonical design of the gradient. The reading lifts the one-day-and-one-night time-bound from the position of a concessive accommodation to the position of a canonical structural design feature. The time-bound is not granted to the lay practitioner because she cannot sustain the Arahant's mode of dwelling; it is designed for the lay practitioner because the periodic adoption is itself the canonical mechanism of gradual training toward the full monastic life — for those who would so progress — and the canonical mechanism of repeated sampling without permanent commitment for those who would remain at the lay-side periodic return. The architectural reading reframes the uposatha, in consequence, from a "lay-side compromise" to a "canonical design of intermittent monasticism." The treatment of śīla-substance theory at P16 and the unpacking of Dàoxuān's vinaya commentary at P17 will resume the present paper's architectural articulation at deeper levels. ---

IV. Scholarly Dialogue

The present chapter continues the three-cast format inherited from P01 through P06 — Bhikkhu Anālayo, Rupert Gethin, and Bhikkhu Bodhi — each engaged through the Concede + Extend two-step structure debuted in P04 and continued through P05 and P06. Peter Harvey is brought in as a secondary scholarly voice, not enrolled in the three-cast, for systematic Western-academic corroboration on the dual-axis lay-monastic ethical reading.¹⁹

4.1 Bhikkhu Anālayo: cross-recension stability → architectural functional reading

Bhikkhu Anālayo's Saṃyukta-āgama Studies (Dharma Drum Publishing, 2015) is the methodological template for contemporary cross-recension comparative studies. His method foregrounds the parallel between the Pāli Nikāyas and the Chinese Āgamas, treating cross-recension comparison as the primary evidentiary axis for observing the stability and variability of canonical passages across translation traditions. The "six-witness 250-year architectural stability of the eight-precept uposatha formula" demonstrated in §2.3 of the present paper is a direct application of Anālayo's method. Concede: Anālayo's cross-recension comparative method is the philological foundation of the present paper; without it, the parallel six-witness stability finding could not be established. Extend: Anālayo's research, however, contains no dedicated chapter on uposatha; his contribution is at the level of methodological template, not substantive interlocutor. The present paper builds on this methodological foundation and advances to the architectural functional reading: the cross-recension stability is not merely a philological fact but architectural evidence that the eight-precept formula is canonical structural design rather than occasional liturgical assembly. The key to this advance is that philological stability must be elevated to architectural functional reading in order to answer T1488 fascicle 7's internal question, "Why are the five precepts received for life, but the eight-precept uposatha for [only] one day and one night?" — the answer to this question lies not at the philological layer but at the functional reading that "the one-day-and-one-night is a canonical structural design feature."¹⁹

4.2 Rupert Gethin: the catuparisā monastic-lay interface → the architecture of the lay practitioner's internal status-transposition

Rupert Gethin's The Foundations of Buddhism (Oxford University Press, 1998), Chapter 9 "The Buddhist community: monks, nuns, and lay followers," treats the uposatha within the catuparisā (fourfold assembly) framework: on the 8th, 14th, and 15th of the lunar month, the lay practitioner enters the monastery, receives the precepts, hears the Dhamma, and participates in the communal uposatha observance, constituting a monastic-lay interface event between the renunciant and lay assemblies. Concede: Gethin's catuparisā framework provides an effective analytical architecture for grasping the sociality and ritual character of the uposatha; the joint assembly of lay and monastic disciples on observance days is indeed a key interface event in the Buddhist community. Extend: Gethin's analysis, however, stops at the externalist description of the "interface event" and does not address the lay practitioner's internal status-transposition on the uposatha day. The present paper advances a step further: the uposatha is not merely the interface between two assemblies but the architectural mechanism by which the lay practitioner internally borrows monastic restraints in a periodic status-transposition. The lay practitioner not only joins the monastic assembly in collective observance but, more decisively, herself borrows the monastic restraints for this day and night, herself emulates the Arahants' mode of dwelling — this internal status-transposition is the canonical structural dimension that Gethin's framework does not reach.¹⁹

4.3 Bhikkhu Bodhi: the eight-precept monograph precedent → the "five lay precepts and three monastic borrowings" architectural decomposition

Bhikkhu Bodhi's Going for Refuge and Taking the Precepts (Buddhist Publication Society Wheel 282/283/284, 1981) is the single strongest dedicated-chapter monograph precedent in Western scholarship on the eight-precept uposatha. Part III of the work, "The Eight Precepts," directly takes the per-precept exposition of the eight restraints as its subject matter, providing per-precept commentary together with a dual framing of the one-day-and-one-night time-bound (training-rules of discipline + foundation of moral life).¹⁹ Concede: Bodhi's monograph treatment is the strongest single Western-scholarly precedent for the present paper's subject; his per-precept commentary plus dual framing supplies concrete reference points for the expositions in §3.1–§3.2 of the present paper. (P05 cited Bodhi's The Noble Eightfold Path; P06 cited Going for Refuge Part II on the five precepts; the present paper enters Part III of the same series of monograph precedents.) Extend: Bodhi's monograph, however, stops at per-precept exposition plus conceptual integration; it does not enter the "five lay precepts plus three monastic borrowings, with borrow-and-return architecture" decomposition. The present paper advances a step further: the eight precepts are not a quantitative accumulation but a qualitative selective borrowing of monastic restraints, and this borrowing receives its canonical-internal architectural articulation in AN 3.70's arahataṁ anukaromi formula. Bodhi's dual framing of the training-rules + foundation captures the two faces of the precept observance but does not make explicit the canonical mechanism of "the lay practitioner borrowing monastic status for the observance day" — and this is the decisive advance of the present paper over Bodhi.

4.4 Peter Harvey: the lay precept system's internal stratification (secondary scholarly voice)

Peter Harvey's An Introduction to Buddhist Ethics: Foundations, Values and Issues (Cambridge University Press, 2000), Chapters 3–5, treats lay-monastic ethics together with the uposatha as the intermittent peak of the lay precept system.¹⁹ Harvey's stratification reading positions the uposatha as a periodic peak event in the lay practitioner's ethical formation, holding a special location within the lay precept system. This observation is compatible with the present paper's intermittent-monasticism reading and supplies an ethical-philosophical reading of the lay-monastic graded ladder as supplementary background. Harvey is not enrolled in the §IV three-scholar dialogue cast (the present paper carries forward the three-cast discipline of Anālayo / Gethin / Bodhi from P01–P06); his citations occur primarily at footnote tier.

4.5 Closing of the three-cast

Synthesising the three-cast — Anālayo's cross-recension philological stability + Gethin's catuparisā interface framework + Bodhi's per-precept monograph precedent — together with Harvey's stratification reading from ethical philosophy, the present paper advances one step beyond all four: the intermittent-monasticism architecture of the uposatha (five lay precepts + three monastic borrowings + the one-day-and-one-night time-bound as canonical structural design feature) is anchored on three axes — AN 3.70's arahataṁ anukaromi formula + T1606's doctrinal justification "in order to gradually train together" + T1488 fascicle 7's time-bound phrasing "when dawn appears, [the precepts] are released" — and is settled as the canonical-internal architectural articulation of the periodic-renunciation mechanism. The significance of the three-axis weaving lies in this: the architectural reading has internal Pāli-canonical articulation (AN 3.70), abhidharmic doctrinal codification (T1606), and Chinese-Mahāyāna lay-precept treatise's internal question (T1488) — a cross-tradition, cross-stratum chain of canonical evidence rather than the isolated claim of a single text.

V. Abhidharmic Treatises + Vinaya + Chinese Commentarial Integration

5.1 The Yogācāra abhidharmic codification: the day-and-night restraint as the eighth of the eight pratimokṣa categories

Asaṅga's Abhidharma-samuccaya fascicles 4–5 and Sthiramati's Abhidharma-samuccaya-vyākhyā fascicles 7–8 (both translated by Xuanzang during the Tang Zhenguan period, 646–648 CE), within their classification of the pratimokṣa-saṃvara (codes of individual liberation through restraint), list the eight-precept uposatha as the eighth restraint category, naming it the day-and-night restraint (ahorātrika-saṃvara · 一日一夜律儀 / 近住律儀).¹⁸ The eight categories of pratimokṣa-saṃvara are, in order: the bhikṣu restraint, the bhikṣuṇī restraint, the sikṣamāṇā restraint (式叉摩那), the sāmaṇera restraint, the sāmaṇerī restraint, the upāsaka restraint (the layman's five precepts), the upāsikā restraint (the laywoman's five precepts), and the day-and-night restraint (the eight-precept uposatha). This categorical codification of the eight categories itself locates the eight-precept uposatha at the architectural connecting position between "lay precepts (the five)" and "monastic precepts (the sāmaṇera's ten and above)" — neither purely lay nor purely monastic, but a periodic structure that the lay practitioner undertakes on observance days. The canonical significance of this codification: the lay-monastic ladder is not a binary opposition but a continuous gradient, and the eight-precept uposatha holds a special transitional function on this gradient.

T1606 fascicle 7's doctrinal explanation, "but the day-and-night restraint is prescribed in order that [practitioners] gradually train together" (但制日夜近住律儀, 為令漸漸俱修學故), has been treated in §3.4 and is not repeated here. What requires further note is that T1606's elaboration of "gradually training together" involves the concept of gradual sampling of monastic restraints: the lay practitioner cannot bear the full weight of monastic restraints all at once (compulsory imposition would carry an excessive risk of breach), but can sample them on observance days, with sampling developing into formation and formation approaching complete undertaking. This gradualist doctrine is the Yogācāra school's doctrinal articulation of the internal developmental trajectory of the lay-monastic ethical ladder.

5.2 The prajñā-Madhyamaka expansion: Kumārajīva's Mahāprajñāpāramitā-śāstra fascicle 13

Kumārajīva's translation of the Mahāprajñāpāramitā-śāstra fascicle 13 (translated during the Later Qin Hong-shi period, 401–413 CE), the chapter on the eight-precept uposatha (八戒齋章), is the principal prajñā-Madhyamaka expansion of the eight precepts.²⁰ Three aspects of this fascicle's exposition carry particular significance. First, fascicle 13 enumerates the "thirty-five drawbacks of breaking the eight-precept uposatha" (a detailed enumeration of consequences of breach — P06 cited this same framework for the intoxicant precept), providing a fine-grained drawback-versus-benefit matching for the bodhisattva-path framing of the eight-precept observance. Second, Nāgārjuna in his own auto-commentary in this fascicle articulates "no day is intrinsically auspicious or inauspicious" (日無好惡), refuting non-Buddhist day-auspiciousness arguments — the view that "the 8th, 14th, and 15th [of the lunar month] carry special auspicious meaning." Nāgārjuna shifts the meaning of the uposatha day from "the auspiciousness of the day itself" to "the meaning of the precepts undertaken." The canonical meaning of the uposatha day lies not in the day's auspiciousness but in the meaning of the discipline the lay practitioner undertakes on the periodic day; this shift of meaning is the prajñā-Madhyamaka layer's de-mystification of the uposatha day. Third, fascicle 13 provides the "six monthly observance days" (六齋日) framework — the 8th, 14th, 15th, 23rd, 29th, and 30th of the lunar month — a six-day calendar that exceeds the Pāli tradition's three observance days (8th, 14th, 15th), reflecting the Chinese tradition's expansion of the uposatha cycle.

5.3 The Chinese-Mahāyāna lay-precept treatise: Dharmakṣema's Upāsaka-śīla-sūtra fascicles 6 and 7

Dharmakṣema's translation of the Upāsaka-śīla-sūtra (T1488, translated in the Northern Liáng Xuán-shǐ period, year 15 / 426 CE) is the most important Mahāyāna lay-precept treatise in the Chinese translation tradition. The sūtra is seven fascicles in total, of which fascicle 6's chapter on the eight-precept uposatha (八戒齋品) and fascicle 7 constitute the concentrated treatment of the eight-precept observance.¹⁷ What must be noted regarding this text: the sūtra has no extant Pāli original in the research corpus, and the present study's citations follow the CBETA Electronic Tripiṭaka XML edition of Taishō volume 24 No. 1488; the translation court was located in Liángzhou (Northern Liáng). The internal question posed in fascicle 7, "Why are the five precepts received for life, but the eight-precept uposatha for [only] one day and one night?" (何緣五戒盡形壽受, 八戒齋法一日一夜?), has been treated in §3.4 as the present paper's core structural question. Fascicle 7 also contains the explicit time-bound phrasing "when dawn appears, [the precepts] are released" (明相出時, 是時則失) — when dawn (aruṇa, 明相) appears, the uposatha precepts release automatically, and the lay practitioner's original five-precept discipline naturally resumes. This explicit articulation of the time-bound is the canonical formulaic statement of the periodic-renunciation mechanism.

5.4 The three vinaya traditions' reception-formula cross-recension witness

The three Chinese vinaya systems exhibit cross-tradition stability in their reception formulae for the eight-precept uposatha. The Mahīśāsaka-vinaya fascicle 15 (T1421) provides the Mahīśāsaka school's reception formula; the Dharmaguptaka-vinaya fascicle 11 (T1428) provides the Dharmaguptaka school's "monk's reception-and-recitation dual track" for laywomen (「受+說」雙軌); and the Mūla-sarvāstivāda-vinaya fascicle 34 (T1442) provides the naming "noble eight-factor near-dwelling training-rule" (聖八支近住學處) together with the cross-tradition variant of four monthly observance days (8th, 15th, 23rd, last day of the lunar month).²¹ The reception formulae of these three vinaya systems are fully identical in the content of the eight precepts (with only slight permutations of order and phrasing), while presenting school-specific differences in the reception ritual (who administers, who receives, the specific verbal phrasing) — this is the vinaya tradition's "identical restraints, differing rituals" cross-recension stability. Detailed case-by-case comparative reading is the main scene of P09 and P10 of the present volume; the present paper offers only a cross-recension cameo to evidence the uposatha's identity across the three vinaya systems.

5.5 The Chinese commentarial layer: Dàoxuān's "mental-utterance" self-administration + Zhiyi's significant absence

Dàoxuān's Sifenlü-xingshichao (T1804, Four-Part Vinaya Practical Guide), fascicle 下, section "Three Modes of the Eight-Precept Procedure" (三明八戒法) at Taishō volume 40, p.140b, written in the Tang seventh century, is the strongest codification in the Chinese commentarial layer of the reception procedure for the eight-precept uposatha.²² Dàoxuān integrates the reception procedure into three modes: first, the self-uttered "mental-utterance" mode (心念口言, the self-administration when no monastic is present); second, kneeling in three-fold going-for-refuge before a monk (the standard reception formula in which a monk administers to the lay practitioner); third, the recitation of the seven-fold uposatha precept text (recitation of the standardised Chinese formulaic text as the form of reception) — and all three "are uposatha" (皆是布薩). Within this three-mode codification, the "mental-utterance" self-administration clause is a distinctive discovery of the Chinese tradition — even in the absence of a monastic witness, the lay practitioner may self-administer the uposatha precepts through mental recitation, architecturally maximising the lay-side accessibility of the uposatha. This self-administration clause has no parallel in the Southern Theravāda tradition; it is the Chinese vinaya school's institutional innovation for lay-precept observance. Detailed treatment of Dàoxuān's vinaya commentary is the main scene of P17 of the present volume; the present paper offers only a brief mention.

The last item to handle is an architecturally significant absence: Zhiyi's Mohe-zhiguan (T1911), written in the late Sui sixth century, contains zero references to the eight-precept uposatha, the eight precepts, or the term uposatha (八關齋, 八戒, 八關).²³ This absence has been confirmed repeatedly through CBETA XML grep. The significance of this zero-citation, however, is not that "Zhiyi has no view on the eight-precept uposatha" but rather that "the Tiantai main scene architecturally yields to the vinaya track" — Zhiyi's precept discourse ascends to the perfect-and-sudden precept (圓頓戒) / single-mind precept (一心戒) at the prajñā-Madhyamaka layer, while the concrete unfolding of the lay-realm uposatha ritual is yielded to Dàoxuān's vinaya track. This absence itself is architectural evidence of doctrinal division of labour between Chinese Buddhist schools, not Zhiyi's oversight. Zhiyi's Bodhisattva-precept Commentary (T1812) contains four brief references to the eight-precept uposatha, all concentrated around the doctrinal emphasis "abstention from eating after noon is the core" (過中食為本); Yongming Yanshou's Wanshan-tonggui-ji (T2017, Five Dynasties / early Northern Song) contains one brief reference, "either receive the one-day precept or undertake the eight-precept uposatha" (或受一日戒, 或持八關齋) — this phrasing belongs to the pastoral register of lay-Buddhist practice, reflecting the lay-Buddhist tradition of periodic precept observance in the Five Dynasties / Song period.²³

VI. Conclusion

Part II of the present volume opens at P05 with the path-element categorical thesis, advances at P06 to the differential canonical scope of the five precepts, and now at the present paper advances to the periodic-renunciation mechanism of the eight-precept uposatha. The core finding of the present paper is: the eight precepts of the uposatha are not a quantitative accumulation atop the five precepts but a "five lay precepts + three monastic borrowings, borrow-and-return" canonical structural design; the "one-day-and-one-night" time-bound is not a concession but a structural design feature, enabling the lay practitioner to sample the Arahant's mode of dwelling without committing to permanent renunciation. The concrete significance of this architectural reading for the practitioner's path is this: what the lay practitioner undertakes on the 8th, 14th, and 15th (or the six-day extended calendar) of the lunar month is not merely a one-day ethical intensification but the canonical practice of "imitating the Arahants' mode of dwelling for this day and this night" — and the meaning of this practice lies not in the quantity of merit accumulated but in the quality of the Arahant's mode of dwelling returning in cycle.

The periodic-renunciation mechanism demonstrated in the present paper carries forward-link significance in two directions. The following paper, P08, will take sīla-gandha (the scent of virtue) as its subject, with AN 3.79 as its primary anchor, demonstrating that the simile of sīla-gandha travelling against the wind is canonical evidence of the social-domain efficacy of precept observance — the collective ritual effect of the eight-precept uposatha among lay assemblies on observance days (the uposatha-saṅghānusavana, the lay uposatha assembly) is the concrete social-domain articulation of the sīla-gandha. The eleven-link chain of AN 11.1 in its first seven links (sīla → avippaṭisāra → pāmojja → pīti → passaddhi → sukha → samādhi) is the natural-arising sequence from precept to concentration; the lay practitioner, in the one day and one night of the uposatha observance, architecturally rehearses these seven links once — sīla (the eight restraints) → avippaṭisāra (the absence of regret from setting worldly affairs aside) → pāmojja → pīti → passaddhi → sukha → samādhi (the lay-side preparation of access concentration on the observance day). This seven-link rehearsal is the most direct canonical mechanism for the SĪLA→SAMĀDHI architectural bridge that P24 (the Śūraṅgama Sūtra's four pure-clear admonitions) will consummate at the Mahāyāna level.

The open question of the present paper is this: if the periodic-renunciation mechanism of the eight-precept uposatha is the canonical design for the lay practitioner to sample the Arahant's mode of dwelling on observance days, then how is this sampling to be re-interpreted under modern institutional conditions (where there is no monastic Sangha for joint observance, no monastery as a venue of communal practice, no traditional observance-day calendar as a periodic framework)? The institutional dimension of this question concerns the canonical basis for the self-organisation of lay Buddhism in modernity; the concrete unfolding of its contemporary applicability is the subject range of Part IX of the present volume.

References

Primary Sources

Pāli Canon (Mahāsaṅgīti Tipiṭaka Buddhavasse 2500 edition, CC0; Sujato translation cited where verbatim):

Aṅguttara-nikāya: AN 3.70 Uposathasutta (PTS AN i 205) — three-typology + six-recollection prelude + eight precepts + arahataṁ anukaromi; AN 4.245 Sikkhānisaṃsasutta (PTS AN ii 244); AN 5.213 Sīlasutta (PTS AN iii 252); AN 8.41 Saṅkhitta-uposathasutta (PTS AN iv 248) — eight-factor full verbatim; AN 8.42 Vitthata-uposathasutta (PTS AN iv 251) — abbreviated variant; AN 8.43 Visākhā-uposathasutta (PTS AN iv 255) — Visākhā variant; AN 11.1 Kimatthiyasutta (PTS AN V 1) — eleven-link chain, cross-volume anchor NIAN P02 + SĪLA P06 + SĪLA P07 + SAMĀDHI P24.
Vault-absent, PTS-only (not blockquoted): AN 9.18 Navaṅguposatha (nine-factor variant) · AN 8.44 Vāseṭṭha · AN 8.45 Bojjhā · AN 7.50 Methuna · AN 5.176 Pīti · AN 5.179 Gihī · KP 2 Dasasikkhāpada · KP 5 Maṅgalasutta · AN 4.61–62 · AN 10.46 Sakkasutta · Sn 2.14 Dhammikasutta.

Chinese Canon (CBETA Electronic Tripiṭaka 2024):

Madhyama-āgama (Saṅghadeva, Eastern Jin Lóng-ān 397–398 CE): fascicle 55 sūtra 202 Pratigraha-sūtra 持齋經 (T0026) — strongest Chinese-side anchor.
Saṃyukta-āgama (Guṇabhadra, Liu Song Yuánjiā 435–443 CE): fascicle 40 (Indra's verses) + fascicle 50 sūtra 1325 (cautionary narrative) (T0099).
Ekottara-āgama (Gautama Saṅghadeva, Eastern Jin 4th–5th c.): fascicle 16, chapter on the three observance days 三齋品 (T0125).
Dīrgha-āgama (Buddhayaśas + Zhu Fonian, Later Qin 412–413 CE, Dharmaguptaka): fascicle 11 Sigāla-sūtra DA 16 (carry-over from P06 caveat: ≠ uposatha) + fascicle 20 Lokaprajñapti-sūtra 世記經 (three-observance-day calendar + Four Heavenly Kings cosmology) (T0001).
Standalone Chinese uposatha sūtras: T0087 Zhāi-jīng 齋經 — Zhi Qian, Wu 3rd c. [attribution corrected from An Shigao 2nd c. per CBETA byline]; T0088 Upāsika-uposatha-sūtra 優陂夷墮舍迦經 — anonymous, appended to the Sòng-dynasty catalogue, 2nd–3rd c. per linguistic dating; T0089 Aṣṭāṅga-uposatha-sūtra 八關齋經 — Juqu Jingsheng, Liu Song 5th c. (the "just as the Arahants" per-precept self-declaration formula).
Upāsaka-śīla-sūtra (Dharmakṣema, Northern Liáng Xuán-shǐ 426 CE; Liángzhou translation court; CBETA XML edition): fascicle 6 chapter on the eight-precept uposatha + fascicle 7 (explicit thesis question + dawn-release formula).
Mahāprajñāpāramitā-śāstra (Kumārajīva, Later Qin 401–413 CE): fascicle 13 chapter on the eight-precept uposatha (T1509) — thirty-five drawbacks + Nāgārjuna's auto-commentary "no day is intrinsically auspicious or inauspicious" + the six monthly observance days framework.
Yogācārabhūmi-śāstra · Bodhisattvabhūmi-śīla-paṭala (Xuanzang, 646–648 CE): fascicle 19 single brief mention (T1579) — treated only in passing here; the full treatment belongs to P14.
Abhidharma-samuccaya (Asaṅga; Xuanzang, trans.): fascicles 4–5 (T1605).
Abhidharma-samuccaya-vyākhyā (Sthiramati; Xuanzang, trans.): fascicles 7–8 (T1606) — primary abhidharmic anchor: the day-and-night restraint as the eighth of the eight pratimokṣa categories + the propaedeutic justification "in order that practitioners gradually train together."
Vinaya cross-witness (treated only in passing here; the full treatment belongs to P09 and P10): Mahīśāsaka-vinaya fascicle 15 (T1421) · Dharmaguptaka-vinaya fascicle 11 (T1428, with "reception and recitation" dual-track) · Mūla-sarvāstivāda-vinaya fascicle 34 (T1442, with the naming "noble eight-factor near-dwelling training-rule" + the four observance-day cross-tradition variant 8th / 15th / 23rd / last day).
Sifenlü-xingshichao 四分律行事鈔 (Dàoxuān, Tang 7th c.): T1804 fascicle 下, "Three Modes of the Eight-Precept Procedure" at Taishō volume 40 p.140b — self-administered "mental-utterance" + kneeling-thrice + recitation formula triad (treated only in passing here; the full treatment belongs to P17).
Mohe-zhiguan (Zhiyi, Sui late 6th c.): T1911 — architecturally significant absence: zero references to the eight-precept uposatha confirmed by CBETA XML grep.
Bodhisattva-precept Commentary (Zhiyi): T1812 — four brief references condensed around "abstention from eating after noon is the core."
Wanshan-tonggui-ji (Yongming Yanshou, Five Dynasties / early Northern Song): T2017 — one brief reference reflecting Five Dynasties / Song lay-Buddhist tradition.
Visuddhimagga Chapter 1 Sīla-niddesa + Chapter 7 §4 Sīlānussati-kathā (Buddhaghosa, 5th c.): chapter-section reference only (no paragraph numbers; vault absent + GRETIL); the placement of the uposatha-sīla within the catukkasīla framework as the lay-baseline intermittent stratum.

Modern Scholarship

Anālayo, Bhikkhu. Saṃyukta-āgama Studies. Dharma Drum Publishing, 2015. [methodological template for cross-recension comparative method; no dedicated uposatha chapter]
Bodhi, Bhikkhu. Going for Refuge & Taking the Precepts. Buddhist Publication Society Wheel 282/283/284, 1981. Part III "The Eight Precepts" — the strongest single Western-scholarly monograph precedent for the present paper's subject matter.
Bodhi, Bhikkhu, trans. The Numerical Discourses of the Buddha: A Translation of the Aṅguttara Nikāya. Wisdom Publications, 2012. [editorial introduction to the Book of Eights covers the uposatha cluster]
Gethin, Rupert. The Foundations of Buddhism. Oxford University Press, 1998. Chapter 9 "The Buddhist community: monks, nuns, and lay followers" — the uposatha under the catuparisā (fourfold assembly) framework.
Harvey, Peter. An Introduction to Buddhist Ethics: Foundations, Values and Issues. Cambridge University Press, 2000. Chapters 3–5 on lay-monastic ethics + uposatha as intermittent peak of lay precept observance [footnote tier; secondary scholarly voice, NOT in §IV three-cast].
Schopen, Gregory. Bones, Stones, and Buddhist Monks: Collected Papers on the Archaeology, Epigraphy, and Texts of Monastic Buddhism in India. University of Hawai'i Press, 1997. [brief mention; lay-monastic boundary continuum congruent with the present paper's thesis]
Ñāṇamoli, Bhikkhu, trans. The Path of Purification (Visuddhimagga). Buddhist Publication Society, 4th ed. (chapter-name citation only; no paragraph numbers — Chapter 1 Sīla-niddesa + Chapter 7 §4 Sīlānussati-kathā primary references)

Sūtra & Śāstra Index

Pāli (alphabetical by sutta name):

Bojjhā-sutta — AN 8.45
Cunda-kammāraputta-sutta — AN 10.176 [P06 carry-forward]
Dasa-sikkhāpada — Khuddakapāṭha 2
Dhammika-sutta — Sutta Nipāta 2.14
Gihī-sutta — AN 5.179
Kimatthiyasutta — AN 11.1 (PTS AN V 1) — cross-volume anchor
Maṅgala-sutta — Khuddakapāṭha 5
Methuna-sutta — AN 7.50 [P06 carry-forward]
Navaṅguposatha-sutta — AN 9.18 [nine-factor variant disclosed]
Pīti-sutta — AN 5.176
Saṅkhitta-uposatha-sutta — AN 8.41 (PTS AN iv 248) — eight-factor full verbatim
Sakkasutta — AN 10.46
Sikkhānisaṃsa-sutta — AN 4.245 (PTS AN ii 244)
Sīlasutta — AN 5.213 (PTS AN iii 252)
Uposatha-sutta — AN 3.70 (PTS AN i 205) — three-typology + arahataṁ anukaromi
Vāseṭṭha-sutta — AN 8.44
Visākhā-uposatha-sutta — AN 8.43 (PTS AN iv 255) — abbreviated variant
Vitthata-uposatha-sutta — AN 8.42 (PTS AN iv 251) — abbreviated variant

Chinese (numerical by T-number):

T0001 Dīrgha-āgama — fascicle 11 Sigāla-sūtra DA 16 (carry-over caveat: ≠ uposatha) + fascicle 20 Lokaprajñapti-sūtra 世記經 (three-observance-day calendar)
T0026 Madhyama-āgama — fascicle 55 Pratigraha-sūtra 持齋經 MA 202 (strongest Chinese-side anchor)
T0087 Zhāi-jīng 齋經 — Zhi Qian, Wu 3rd c. [attribution corrected]
T0088 Upāsika-uposatha-sūtra 優陂夷墮舍迦經 — anonymous, appended to Sòng-catalogue, 2nd–3rd c. per Nattier 2008
T0089 Aṣṭāṅga-uposatha-sūtra 八關齋經 — Juqu Jingsheng, Liu Song 5th c.
T0099 Saṃyukta-āgama — fascicle 40 (Indra's verses) + fascicle 50 sūtra 1325 (cautionary narrative)
T0125 Ekottara-āgama — fascicle 16, the three observance days 三齋品
T1421 Mahīśāsaka-vinaya — fascicle 15 (treated in passing; full treatment in P09 and P10)
T1428 Dharmaguptaka-vinaya — fascicle 11 (treated in passing; "reception and recitation" dual-track)
T1442 Mūla-sarvāstivāda-vinaya — fascicle 34 (treated in passing; "noble eight-factor near-dwelling training-rule" + four observance days)
T1488 Upāsaka-śīla-sūtra — fascicle 6 + fascicle 7 (vault absent · CBETA XML edition)
T1509 Mahāprajñāpāramitā-śāstra — fascicle 13, chapter on the eight-precept uposatha
T1579 Yogācārabhūmi-śāstra — fascicle 19 brief mention (treated in passing; full treatment in P14)
T1605 Abhidharma-samuccaya — fascicles 4–5
T1606 Abhidharma-samuccaya-vyākhyā — fascicles 7–8 (primary abhidharmic anchor)
T1804 Sifenlü-xingshichao — fascicle 下, "Three Modes of the Eight-Precept Procedure" at Taishō vol. 40 p.140b (treated only in passing here; the full treatment belongs to P17)
T1812 Bodhisattva-precept Commentary — four brief references
T1911 Mohe-zhiguan — architecturally significant absence (zero references)
T2017 Wanshan-tonggui-ji — one brief reference

Sanskrit śāstra (by author):

Buddhaghosa, Visuddhimagga — Chapter 1 Sīla-niddesa + Chapter 7 §4 Sīlānussati-kathā (paraphrase only)

Cross-References

Within-volume continuity

SILA P01–P04 (Part I foundations): the three-axis articulation of sīla (P01), sīla as the fourth sotāpattiyaṅga (P02), sīla as an object of recollection (P03 — the sīlānussati axis is directly continuous with AN 3.70's six-recollection prelude in the ariy-uposatha), and the ekaggatā object-structure argument (P04).
SILA P05 (Part II #1): the three ethical limbs of the noble eightfold path as constitutive path-elements, not a constraint-list.
SILA P06 (Part II #2, immediately prior): the five precepts as five different canonical-scope path-elements ("same ritual, different scope"). The present paper extends this thesis to the lay-renunciate intermittent stratum: same reception ritual, different canonical scope — the uposatha is structurally a different observance category from the standing five precepts, not a quantitative extension of them.

Within-volume forward links

SILA P08 (Part II #4): sīla-gandha (the scent of virtue) and sīla in the social field — the uposatha's lay-assembly social phenomenon (the uposatha-saṅghānusavana) prefigures P08's social-domain treatment.
SILA P09 + P10 (Part III): the pāṭimokkha structure and the three-vinaya-tradition comparative reading — the present paper's vinaya cross-recension cameo (T1421 + T1428 + T1442) is unpacked in detail at this volume stage.
SILA P12 + P14 + P16 + P17 (Mahāyāna and vinaya strata): the three pure-precept aggregation (P12), the nine aspects of the bodhisattva precepts (P14), the precept-substance theory (P16), and Dàoxuān's Four-Part Vinaya Practical Guide unpacked in full (P17, where the present paper's "three modes of the eight-precept procedure" material is treated at full extent).

Cross-volume relations

DĀNA volume — P06 carry-forward: the killing-precept's abhaya-dāna (gift of fearlessness) reading at AN 8.39 supplies the SĪLA↔DĀNA bridge. The present paper's first precept (abstention from killing) continues this same architectural reading.
SAMĀDHI volume forward — the eleven-link chain of AN 11.1 (sīla → avippaṭisāra → pāmojja → pīti → passaddhi → sukha → samādhi → ...) is canonical evidence that sīla naturally unfolds into samādhi. The lay practitioner's one-day-and-one-night observance is an architectural rehearsal of the first seven links of this chain — the lay practitioner, by adopting monastic restraints for a day, experientially samples the sīla → ... → samādhi developmental gradient. The full eleven-link soteriological unfolding is reserved for P24 (the Śūraṅgama Sūtra's four pure-clear admonitions, where the SĪLA→SAMĀDHI architectural handoff is consummated at the Mahāyāna level).

Octalogy (sister series) relation

The Octalogy (八部曲) series treats sīla doctrinally as one of the three trainings (tri-śikṣā); the SĪLA volume of the Six Practice Gates treats sīla developmentally — the path-oriented (行) counterpart of the doctrinal (見 / 慧學) treatment. The present paper's intermittent-monasticism architectural argument is path-oriented; the Octalogy treats the uposatha (where treated at all) at the doctrinal-overview register.

CBETA collation: The Pāli anchors (AN 3.70 Uposathasutta · AN 5.213 Sīlasutta · AN 4.245 Sikkhānisaṃsasutta · AN 11.1 Kimatthiyasutta · AN 8.41–43 Uposathavagga cluster) follow the Mahāsaṅgīti Tipiṭaka Buddhavasse 2500 (CC0) edition, dual-cited with PTS volume references; the Sujato (CC0) English translations are cited inline where verbatim. Saṃyukta-āgama (T0099 fascicle 40 + fascicle 50 sūtra 1325) · Madhyama-āgama (T0026 fascicle 55 sūtra 202 Pratigraha-sūtra) · Dīrgha-āgama (T0001 fascicle 20 Lokaprajñapti-sūtra) · Ekottara-āgama (T0125 fascicle 16 三齋品) · Zhāi-jīng (T0087, Zhi Qian, Wu 3rd c. — attribution corrected from An Shigao 2nd c. per CBETA byline) · Upāsika-uposatha-sūtra (T0088, anonymous, 2nd–3rd c. per Nattier 2008) · Aṣṭāṅga-uposatha-sūtra (T0089, Juqu Jingsheng, Liu Song 5th c.) · Upāsaka-śīla-sūtra (T1488 fascicles 6 and 7

Author: Shi Huijing (釋慧鏡) Project: 指月 Point-to-the-moon · 六行門 Six Practice Gates License: CC BY-NC-SA 4.0 Repository: github.com/pointing-at-the-moon/six-practice-gates

Footnotes

P06 The Five Precepts and Their Canonical Scope establishes the categorical thesis that "the five precepts are not a homogeneous enumeration of lay restraints but a set of five path-element constituents each bearing a different canonical scope," with "same reception ritual, different canonical scope" as the core reading. The present paper carries this discipline forward, advancing "path-element constituent" at the lay practitioner's periodic-elevation locus into the concrete exposition of the eight-precept uposatha. ↩
AN 3.70 Uposathasutta, Pāli Aṅguttara Nikāya, Book of Threes, sutta 70; the central reception formula imañca rattiṁ imañca divasaṁ arahataṁ anukaromi · iminā ca me aṅgena uposatho upavuttho bhavissati. PTS reference AN i 205. The present paper relies on the Sujato translation (CC0 licence). The four-element unity — the three-typology of uposatha (gopālaka-uposatha / nigaṇṭha-uposatha / ariy-uposatha) + the six-recollection prelude (cha anussatiyo: Buddha, Dhamma, Saṅgha, sīla, cāga, devatā) + the eight precepts + the arahataṁ anukaromi formula — constitutes the present paper's primary anchor for canonical-internal architectural articulation. ↩ ↩² ↩³
T0026 Madhyama-āgama fascicle 55, sūtra 202, Pratigraha-sūtra (持齋經, MA 202), translated by Saṅghadeva in the Eastern Jin Lóng-ān period, years 2–4 (397–398 CE). The passage cited in the present paper — "Upāsikā, by thus fully receiving the eight-factor fast, on the uposatha day you are like an Arahant, crossing birth-and-death by your own power. I too am thus: today and tonight I too practise the precepts, I too practise the fast" — is the Chinese-side principal anchor corresponding to arahataṁ anukaromi; it contains a five-recollection framework that stands in cross-tradition variant relation to AN 3.70's six-recollection prelude. CBETA collated. ↩ ↩²
T0125 Ekottara-āgama fascicle 16, the chapter on the three observance days (三齋品), translated by Gautama Saṅghadeva in the Eastern Jin period (4th–5th century); contains the three-observance-day calendar of the 8th, 14th, and 15th. T0001 Dīrgha-āgama fascicle 20, Lokaprajñapti-sūtra (世記經), translated by Buddhayaśas and Zhu Fonian in the Later Qin Hong-shi period, years 12–15 (412–413 CE), transmitted by the Dharmaguptaka school; contains the three-observance-day calendar together with the cosmological framework of the Four Heavenly Kings descending to observe human conduct. CBETA collated. ↩ ↩² ↩³
T0087 Zhāi-jīng (齋經, the Sūtra on the Fasting Observance), translated by Zhi Qian (支謙), Wu, 3rd century (the earliest extant Chinese translation of an independent uposatha sūtra, about 150 years before MA 202). Traditional bibliographic catalogues long attributed this sūtra to An Shigao of the Later Han (2nd century); the CBETA Electronic Tripiṭaka, however, records the translator at the head of T0087 as clearly Zhi Qian (Wu, 3rd century) — the present study makes this correction following the attribution recorded in CBETA, in order to avoid perpetuating the traditional misattribution. The sūtra contains the three-classification of "cowherd fast / Nigaṇṭha fast / Buddha-Dharma fast," which corresponds structurally and completely to the Pāli AN 3.70's three-typology of uposatha. CBETA collated. ↩ ↩²
T0088 Upāsika-uposatha-sūtra (優陂夷墮舍迦經), anonymous translator, appended to the Sòng-dynasty catalogue (Sengyou's Chu sanzang ji ji); the translation court and translator are unknown. Linguistic dating places it broadly in the early translation period of the 2nd–3rd century, but neither the exact date nor the translator can be reconstructed. The present paper adopts a conservative stance on the dating and translator question, not insisting on a specific attribution. CBETA collated. ↩ ↩²
T0089 Aṣṭāṅga-uposatha-sūtra (八關齋經, the Eight-Precept Uposatha Sūtra), translated by Juqu Jingsheng (沮渠京聲), Liu Song, 5th century; the most complete expression of the reception formula among the Chinese independent translations, articulated precept by precept: 「猶如阿羅漢，盡形壽不殺生……如是我字某名某，一日一夜不殺生，亦不教人使殺生」 ("Just as the Arahants, for the whole of their lives, do not kill living beings — so I, named so-and-so, for one day and one night will not kill living beings, nor incite others to kill"); verified verbatim against CBETA T01n0089, 2026-06-10. The companion early witness, Zhi Qian's Zhāi-jīng (T0087), opens each of its eight precepts with 「盡一日一夜持，心如真人」 ("for the full day and night, hold the mind like a True Person"); True Person (真人) is one of the principal Chinese renderings of "Arahant" in the Han–Wei–Six Dynasties Buddhist translations (verified against CBETA T01n0087). An earlier version of this note attached a composite reception line ("I, NN, take refuge in the Buddha… holding the mind as a True Person") to T0089; that line matches no extant canonical text and is corrected here. ↩ ↩²
Cross-recension architectural stability finding: the content of the eight-precept uposatha formula across the six witnesses (AN 8.41 Pāli + MA 202 Chinese + EA fascicle 16 + T0087 + T0088 + T0089) spans the 2nd to the 5th century (about 250 years); content is fully stable, with order only slightly permuted (the precept of abstention from food at the wrong time placed at the 6th or last position in two orderings), and no witness adds or removes any precept. This philological finding is itself the strongest single piece of evidence that "the eight-precept uposatha is not a coincidental aggregation but a canonical structural design," and constitutes the philological basis of the core architectural argument running through §I + §2.3 + §4.1 + §VI of the present paper. ↩ ↩² ↩³
AN 8.41 Saṅkhitta-uposathasutta (the Brief Discourse on the Uposatha), Pāli Aṅguttara Nikāya, Book of Eights, sutta 41, PTS reference AN iv 248, is the principal anchor for the complete verbatim eight-factor reception formula. AN 8.42 Vitthata-uposathasutta (the Detailed Discourse on the Uposatha), PTS reference AN iv 251, is an abbreviated variant using …pe… (ellipsis marker) + the comparison of sixteen great kingdoms + the six heavenly-realm cosmology. AN 8.43 Visākhā-uposathasutta (the Discourse to Visākhā on the Uposatha), PTS reference AN iv 255, is a discourse to the laywoman Visākhā, also abbreviating the eight precepts with …pe…. The eight-factor content of all three suttas is identical to AN 8.41. Sujato translation (CC0 licence). ↩ ↩² ↩³ ↩⁴
Pāli sources absent from the research corpus, cited only by PTS reference: AN 9.18 Navaṅguposatha (the nine-factor uposatha · variant adding loving-kindness recollection to the eight), AN 8.44 (Vāseṭṭha), AN 8.45 (Bojjhā), AN 7.50 Methuna, AN 5.176 Pīti, AN 5.179 Gihī, KP 2 Dasasikkhāpada (the Ten Training-Rules), KP 5 Maṅgalasutta, AN 4.61–62, AN 10.46 Sakkasutta, Sn 2.14 Dhammikasutta. The present paper mentions these only descriptively and does not blockquote them. ↩ ↩²
AN 5.213 Sīlasutta, Pāli Aṅguttara Nikāya, Book of Fives, sutta 213; PTS reference AN iii 252. Sujato translation (CC0 licence). The "five drawbacks + five benefits" worldly-consequence register stands in dual-register complementarity with AN 11.1's soteriological-path register. ↩
AN 11.1 Kimatthiyasutta (the Discourse on the Purpose), Pāli Aṅguttara Nikāya, Book of Elevens, sutta 1, PTS reference AN V 1. The eleven-link chained progression: sīla → avippaṭisāra → pāmojja → pīti → passaddhi → sukha → samādhi → yathābhūta-ñāṇadassana → nibbidā → virāga → vimuttiñāṇadassana. Sujato translation (CC0 licence). Cross-volume anchor: this sutta is cited in the present series in NIAN P02, SĪLA P06, SĪLA P07, and SAMĀDHI P24, serving as Pāli canonical evidence of the natural-arising sequence from "precept to concentration." ↩
AN 4.245 Sikkhānisaṃsasutta (the Discourse on the Benefits of Training), Pāli Aṅguttara Nikāya, Book of Fours, sutta 245, PTS reference AN ii 244. Sikkhā carries the dynamic-formation semantic field, distinct from sīla's static-virtue semantic field; the uposatha's choice of sikkhāpada (training-rule) register itself carries the meaning of "gradual formation." Sujato translation (CC0 licence). ↩
T0099 Saṃyukta-āgama fascicle 40 and fascicle 50 (sūtra 1325), translated by Guṇabhadra in the Liu Song Yuánjiā period, years 12–20 (435–443 CE); fascicle 40 contains Indra's verses praising the uposatha, and fascicle 50 sūtra 1325 contains a cautionary narrative of breach of precept on the uposatha day. CBETA collated. ↩
T0001 Dīrgha-āgama fascicle 11, sūtra 16, Sigāla-sūtra (善生經, DA 16), translated by Buddhayaśas and Zhu Fonian. This sūtra contains only the six causes of wealth loss + the six drawbacks of intoxicants and does not contain the reception formula for the eight-precept uposatha; it is an expansion of the intoxicant precept within the five precepts, not a basis for the eight-precept uposatha. This distinction was first noted in P06 of the present volume and is carried forward unchanged in the present paper. CBETA collated. ↩
Buddhaghosa's Visuddhimagga Chapter 1, Sīla-niddesa (the Exposition of Virtue), is a structural absence in the research corpus's Pāli source materials (verified four times across the present research series); Chapter 7 §4, Sīlānussati-kathā (the Discourse on the Recollection of Virtue), is included in the research corpus, but its licensing settings (GRETIL CC-BY-SA) do not permit verbatim publication. The present paper cites the Visuddhimagga entirely in paraphrase + chapter-section names, without paragraph numbers, deferring to print collation against the Bhikkhu Ñāṇamoli translation (Buddhist Publication Society, 4th edition). ↩
T1488 Upāsaka-śīla-sūtra fascicle 6, the chapter on the eight-precept uposatha (八戒齋品), and fascicle 7, translated by Dharmakṣema in the Northern Liáng Xuán-shǐ period, year 15 (426 CE), at the Liángzhou translation court. The sūtra has no extant Pāli original in the research corpus; the present study's citations follow the CBETA Electronic Tripiṭaka XML edition of Taishō volume 24 No. 1488. The internal question raised in fascicle 7, "Why are the five precepts received for life, but the eight-precept uposatha for [only] one day and one night?" together with the time-bound formulaic statement "when dawn appears, [the precepts] are released," is the canonical basis for the core structural question of §3.4 of the present paper. CBETA collated. ↩ ↩²
T1605 Abhidharma-samuccaya fascicles 4–5 (composed by Asaṅga) and T1606 Abhidharma-samuccaya-vyākhyā fascicles 7–8 (composed by Sthiramati), both translated by Xuanzang in the Tang Zhenguan period, years 20–22 (646–648 CE). The Yogācāra school classifies the pratimokṣa-saṃvara into eight categories (bhikṣu / bhikṣuṇī / sikṣamāṇā / sāmaṇera / sāmaṇerī / upāsaka / upāsikā / day-and-night), of which the day-and-night restraint (ahorātrika-saṃvara) is the eight-precept uposatha. T1606 fascicle 7: "but the day-and-night restraint is prescribed in order that [practitioners] gradually train together" — the principal anchor for the doctrinal justification of the one-day-and-one-night time-bound. CBETA collated. ↩ ↩²
Scholarly references (at chapter level): Anālayo, Saṃyukta-āgama Studies (Dharma Drum, 2015), methodological template for cross-recension comparative method; Gethin, The Foundations of Buddhism (Oxford University Press, 1998), Chapter 9 "The Buddhist community: monks, nuns, and lay followers," the uposatha under the catuparisā (fourfold assembly) framework as a monastic-lay interface event; Bodhi, Going for Refuge and Taking the Precepts (BPS Wheel 282/283/284, 1981), Part III "The Eight Precepts," the single dedicated-chapter monograph precedent in Western scholarship on the eight-precept uposatha; Harvey, An Introduction to Buddhist Ethics (Cambridge University Press, 2000), Chapters 3–5, treats lay-monastic ethics together with the uposatha as the intermittent peak of the lay precept system. Schopen 1997 Bones, Stones, and Buddhist Monks brief mention of the lay-monastic interface in the Indian epigraphic reading of vinaya material. ↩ ↩² ↩³ ↩⁴ ↩⁵
T1509 Mahāprajñāpāramitā-śāstra fascicle 13, the chapter on the eight-precept uposatha (八戒齋章), translated by Kumārajīva in the Later Qin Hong-shi period, years 3–15 (401–413 CE); contains the "thirty-five drawbacks of breaking the eight-precept uposatha" detailed drawback-versus-benefit matching, Nāgārjuna's auto-commentary "no day is intrinsically auspicious or inauspicious" refuting day-auspiciousness arguments, and the "six monthly observance days" extended calendar (the 8th, 14th, 15th, 23rd, 29th, and 30th of the lunar month). This fascicle is the prajñā-Madhyamaka expansion of the eight-precept uposatha and one of the principal reference points for the Chinese abhidharmic layer. CBETA collated. ↩
Cross-recension witness of the eight-precept uposatha reception formula across the three vinaya systems: T1421 Mahīśāsaka-vinaya fascicle 15 (Mahīśāsaka school) + T1428 Dharmaguptaka-vinaya fascicle 11 (Dharmaguptaka school · the "reception and recitation" dual-track) + T1442 Mūla-sarvāstivāda-vinaya fascicle 34 (Mūla-sarvāstivāda school · the "noble eight-factor near-dwelling training-rule" naming + the cross-tradition variant of four observance days "8th, 15th, 23rd, last day"). The present paper offers only a cross-recension brief mention; detailed case-by-case comparative reading is the main scene of P09 and P10 of the present volume. CBETA collated. ↩
T1804 Sifenlü-xingshichao (the Practical Compendium of the Four-Part Vinaya), fascicle 下, "Three Modes of the Eight-Precept Procedure" (三明八戒法), Taishō volume 40 p.140b, vinaya-school commentary written by Dàoxuān in the Tang seventh century. Three-mode reception procedure: "Some self-utter 'I mentally vow with verbal expression'; some kneel in three-fold going-for-refuge with three petitions before a monk; some recite the seven-fold uposatha text — all these are uposatha." The "mental-utterance" self-administration clause is a distinctive discovery of the Chinese tradition with no parallel in the Southern Theravāda tradition; this clause architecturally maximises the lay-side accessibility of the uposatha. The present paper offers only a brief mention; detailed treatment of Dàoxuān's vinaya commentary is the main scene of P17 of the present volume. CBETA collated. ↩
T1911 Mohe-zhiguan, dictated by Zhiyi in the late Sui sixth century and recorded by his disciple Guanding; references to the eight-precept uposatha, the eight precepts, or the term uposatha (八關齋, 八戒, 八關) are zero (verified repeatedly through CBETA XML grep). The architectural significance of this absence is "the Tiantai main scene architecturally yields to the vinaya track," not Zhiyi's oversight. T1812 Bodhisattva-precept Commentary, composed by Zhiyi, contains four brief references to the eight-precept uposatha, concentrated around the doctrinal emphasis "abstention from eating after noon is the core." T2017 Wanshan-tonggui-ji, composed by Yongming Yanshou in the Five Dynasties / early Northern Song, contains one brief reference: "either receive the one-day precept or undertake the eight-precept uposatha" — belonging to the pastoral register of lay-Buddhist practice. CBETA collated. ↩ ↩²

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