Bǎizhàng 百丈

Tang-period Chán master Bǎizhàng Huáihǎi 百丈懷海 (720–814), a principal heir of Mǎzǔ Dàoyī 馬祖道一 and traditionally credited with the codification of the early Chán monastic rule (Bǎizhàng qīngguī 百丈清規).