《史记·七十列传·商君列传》
再说凭靠着国君宠臣景监的推荐，等到被任用，就刑罚公子虔，欺骗魏将公子卬，不听赵良的规劝，足以证明商君残忍少恩了。
且所因由嬖臣，及得用，刑公子虔，欺魏将卬，不师赵良之言，亦足发明商君之少恩矣。
Furthermore, due to the recommendation of the king's favorite, Jing Jian, after Shang Yang had been appointed, he punished Duke Qian, deceived the Wei general Prince Ang, and ignored the advice of Zhao Liang, which was enough to prove Shang Yang was brutal and ungrateful.