Bǎizhàng Huáihǎi 百丈懷海 (749–814)
Tang Chán master, dharma-heir of 馬祖道一 Mǎzǔ Dàoyī, abbot of Dàxióng-shān 大雄山 / Bǎizhàng-shān 百丈山 in Hóngzhōu 洪州 (modern Jiāngxī). Conventionally credited with the foundational codification of Chán monastic regulations — the Chánlín qīngguī 禪林清規 / Bǎizhàng qīngguī 百丈清規 tradition (see KR6r0050 / KR6r0049) — which displaced the Vinaya-school xíngshì literature in actual Chán-monastery practice. Bǎizhàng’s signature dictum, yī rì bù zuò, yī rì bù shí 一日不作一日不食 (“a day without work is a day without food”), made manual labour an integral component of Chán monastic life. Per DILA A000033.