Dayi Daoxin (Chinese: 道信， Wade–Giles: Tao-hsin) (Japanese: Dōshin) (580–651) was the fourth Chán Buddhist Patriarch, following Jianzhi Sengcan 僧璨 (died 606) (Wade–Giles: Chien-chih Seng-ts'an; Japanese: Kanchi Sosan) and preceding Hongren Chinese: 弘忍) (601–674).The earliest mention of Daoxin is in the Hsü kao-seng chuan (Further Biographies of Eminent Monks (645) (Pin-yin, Xu gao-seng zhuan; Japanese, Zoku kosoden;) by Tao-hsuan (d.