佛祖統紀 9.25

9.25

Chan Master Fashen initially resided at Dazhuangyan Monastery in Jinling. Receiving the Three Contemplations from Zhiyi, he had an open and deep realization. Through concentration, he developed retentive power and could remember whatever he heard once. In the third year of the Dajian era of the Chen dynasty, when Zhiyi was teaching the Sequential Gates of Chan at Waguan, the Master privately recorded it during the lectures into thirty scrolls. Before he could edit it, he unfortunately passed away. Later, Zhang'an edited and established it into ten scrolls, which is the Sequential Calming and Insight on the Perfection of Meditation.