《韩非子·难一》
桓公不能整治君臣关系而去礼遇该罚该杀的人，这是桓公用轻视和侮慢君主的风气来教化齐国，是不能用来作为治国之道的。
桓公不能领臣主之理而礼刑戮之人，是桓公以轻上侮君之俗教于齐国也，非所以为治也。
Huan Gong could not rectify the relationship between the monarch and his subjects but treated the people who should be punished and killed with courtesy, so Huan Gong taught Qi State with the practice of despising and humiliating the monarch, which could not be used as a way to govern the country.