《左传·昭公·昭公五年》
昭子即位，召集他家族上下人等来朝见，说： 竖牛给叔孙氏造成祸乱，搅乱了重大的正常秩序，杀死嫡子立庶子，又分裂封邑，将要以此逃避罪责，罪过没有比这再大的了。
昭子即位，朝其家众，曰： 竖牛祸叔孙氏，使乱大从，杀適立庶，又披其邑，将以赦罪，罪莫大焉。
Zhaozi succeeded to the throne and summoned the people of his family to see him and said: Zhu Niu caused chaos for the Shu Sun clan, disrupted the major normal order, killed his eldest son and established his concubine's son, and divided the fiefdom again. Fleeing guilt, the crime is no greater than this.