《左传·襄公·襄公十年》
士庄子说： 高子作为太子的相礼会见了诸侯，应当捍卫他们的国家，但却表现出不严肃，这是丢弃国家，恐怕将会不免于祸吧！ 
士庄子曰： 高子相大子以会诸侯，将社稷是卫，而皆不敬，弃社稷也，其将不免乎？ 
Shi Zhuangzi said: Gaozi, as the prince's representative, met the feudal lords and should defend their country, but showed no seriousness. This is to abandon the country, and I am afraid it will not be free from disaster!