《左传·宣公·宣公十八年》
公孙归父由于他父亲襄仲立了鲁宣公，而受到宣公宠信，他想要去掉孟孙、叔孙、季孙这 三桓 ，以伸张公室的权力。
公孙归父以襄仲之立公也有宠，欲去三桓以张公室。
Gongsung Guifu was favored by Duke Xuan because his father Xiang Zhong had established Duke Xuan, and he wanted to get rid of the Three Huan, Mengsun, Shusun, and Jisun, in order to expand the power of the ducal family.