《北史·列传·卷六十九》
这之后开始教授学生，每次到了讲坛，先手持经籍义疏，然后才开始讲解。
是后教授门徒，每临讲坐，先持执疏，然后敷讲。
After that, he began to teach students, and every time he went to the lecture hall, he first held the scriptures and commentaries, and then began to lecture.