《战国策·齐三·孟尝君出行国至楚》
公孙戌快步退了出去，走到中门，孟尝君起了疑心，把他叫了回来： 先生叫田文勿受象牙床之礼，这固然是一项很好的建议，但为何先生如此乐不可支呢？ 
公孙戍趋而去。未出，至中闺，君召而返之，曰： 子教文无受象床，甚善。今何举足之高，志之扬也? 
Gongsunxu took a quick step to leave. When he got to the middle gate, the Monarch Mengchang became suspicious and called him back: "Sir, you told Tian Wen not to accept the gift of ivory bed, which is indeed a very good suggestion. However, why are you so elated?"