高僧傳 11.14

11.14

時又有慧開、慧真等，亦善禪業。入餘姚靈祕山，各造方丈禪龕，于今尚在。

At that time there were also Huikai, Huizhen, and others, who were likewise skilled in the practice of dhyāna. They entered Mount Lingmi in Yuyao, and each built a one-fathom dhyāna niche, which still exist today.