《北齐书·列传·卷四十四》
学生到乡村寄食为生；在桑梓树下稍作休息，动不动就超过上千人。
入闾里之内，乞食为资；□桑梓之阴，动逾千数。
Students went to live in the villages in order to have food and lodging; when they rested for a short time under the mulberry and catalpa trees, their numbers often exceeded a thousand.