高僧傳 10.43

10.43

時涼州復有沙門智整，亦貞苦有異行，為[系-小]主楊難當所事。後入寒峽山石穴中不返。

At that time in Liangzhou, there was also the śramaṇa Zhizheng, who was likewise chaste, austere, and possessed of extraordinary conduct, and was served by the Di ruler Yang Nandang. Later, he entered a stone cave in the Hanxia Mountains and did not return.