《韩非子·外储说左下》
冒犯龙颜，极力劝谏，我比不上东郭牙，请您任命他为主管谏议的官。 治理好齐国，这五个人就够用了；若要成就霸王之业，则有我管夷吾在这里。 
犯颜极谏，臣不如东郭牙，请立以为谏臣。治齐，此五子足矣；将欲霸王，夷吾在此。 
I have offended the dragon eyes and put in strenuous advice, I am not as good as Dongguo Ya, so I request that your majesty appoints him as the lord of advice and remonstration. To govern the state of Qi, these five people will be enough; should you want to accomplish the hegemonic cause, I, Guan Zhong, am here for you.