《三国志·魏书·程郭董刘蒋刘传》
等到郭嘉去世，太祖亲自去吊唁，非常哀痛，对荀彧等人说： 各位的年龄都和我是同辈，只有郭奉孝年龄最小。
及薨，临其丧，哀甚，谓荀攸等曰： 诸君年皆孤辈也，唯奉孝最少。
When Guo Jia died, the emperor went to pay his respects in person. He was very sad and said to Xun Yu and others: All of you are about the same age as me, only Guo Fengxiao is the youngest.