《韩非子·内储说上七术》
叔孙豹有个儿子叫仲壬，竖牛嫉妒他，并想杀了他，因而和仲壬一起到鲁君住处去游玩。
叔孙有子曰壬，竖牛妒而欲杀之，因与壬游于鲁君所。
Shusun Bao had a son named Zhongren, whom Shuniu envied and wanted to kill, so he went with Zhongren to play at the residence of the Lord of Lu.