《汉书·传·东方朔传》
因为淫乱会逐渐演变为篡逆大祸，所以春秋时竖貂行为淫乱而勾结易牙作乱，庆父死了鲁国才得以保全，诛杀管叔、蔡叔西周王室方享安宁。 
故淫乱之渐，其变为篡，是以竖貂为淫而易牙作患，庆父死而鲁国全，管、蔡诛而周室安。 
Because lewdness will gradually evolve into a great disaster of rebellion, so during the Spring and Autumn Period, Shu Diao was lewd and colluded with Yi Ya to make trouble. The country of Lu was preserved only after the death of Qingfu, and Guanshu and Caishu were executed. The royal family of Western Zhou could enjoy peace.