《左传·哀公·哀公二十七年》
哀公担忧三桓的威胁，想利用诸侯除掉他们；三桓也担忧哀公的狂妄，所以君臣之间嫌隙很多。
公患三桓之侈也，欲以诸侯去之。三桓亦患公之妄也，故君臣多间。
Duke Ai was distressed by the overbearing conduct of the Three Families, and purposed to make use of the feudal princes to remove them; the Three Families were also alarmed by his tyrannical conduct, so that many were the grudges between the prince and his ministers.