高僧傳 8.84

8.84

時定林上寺復有沙彌聖進，本閹人。清信篤至，遂出家苦節。嘗頭陀至東山，宿于樹下。有虎來摩其頭，見進端坐無擾，跪之而去。後每獨行獨坐，常見青馬一匹，衛其左右。

At that time at the Upper Dinglin Temple there was also the novice Shengjin, originally a eunuch. His pure faith was exceedingly sincere, and he eventually left the household to practice austere discipline. Once, while practicing dhūta on the Eastern Mountain, he stayed overnight beneath a tree. A tiger came and rubbed his head, and seeing Jin sitting upright without being disturbed, knelt before him and left. Thereafter, whenever he walked or sat alone, a blue-grey horse was constantly seen guarding him on either side.