《左传·哀公·哀公二十年》
吴国的公子庆忌屡次劝谏吴王说： 如果不改变政令，一定亡国。 
吴公子庆忌骤谏吴子曰： 不改，必亡。 
The State of Wu's noble son, Qingji, repeatedly advised the King of Wu, saying: If you do not change your administration, you will definitely lose your country. 