Fó shuō shí fēishí jīng 佛說時非時經 (recension b)
The Buddha Speaks: The Sūtra of Proper and Improper Times (Skt. Kālākālasūtra) — recension b translated by 若羅嚴 (Ruòluóyán, 譯)
About the work
T794b in one fascicle is the second extant recension of the Shí fēishí jīng translated by 若羅嚴 (Ruòluóyán) at Khotan in the late third century — the parallel of T794a. The two recensions descend from the same translation event but were transmitted through different manuscript traditions, with minor textual divergences (chiefly in phrasing, terminological choices, and the inclusion of variant edge-cases) but no substantial doctrinal differences.
Abstract
The doctrinal content is identical to that of T794a: the kāla-akāla (proper / improper times) vinaya-rule on the bi-fold division of the monastic day. Monks may take food only between sunrise and noon; the eka-bhakta-bhojin discipline of one meal a day, eaten before the sun crosses the meridian, is foundational to the prātimokṣa. After noon only certain after-time-permissibles may be taken under defined exceptions. See the description for KR6i0498 for fuller doctrinal treatment.
The two-recension situation reflects the manuscript-tradition history of late-Han / Six Dynasties Chinese Buddhist translations, where short sūtra-texts circulated in multiple copies that diverged in minor textual details before being collected into the canonical compilations. The Taishō editors preserved both recensions as T794a and T794b respectively, with a-recension being the principal text and b-recension marked as the variant tradition.
Translations and research
See KR6i0498 for the relevant secondary literature.