佛祖統紀 23.45

23.45

First year of Kaiyuan (guichou, lasting twenty-nine years).
In the eighteenth year of Kaiyuan, the Eighth Patriarch, Chan Master Zuoxi, expounded cessation and contemplation for Chan Master Jingxi Ran at Zuoxi in Dongyang. In this year, Pŏmyung and others of Silla transmitted the teachings and returned to their country.
First year of Tianbao (renwu, lasting fourteen years). On the nineteenth day of the ninth month in the thirteenth year of Tianbao, Chan Master Zuoxi manifested nirvāṇa.