《周书·列传·卷二十九》
耿豪说： 世人说李穆、蔡佑，是丞相臂膊；耿豪、王勇，是丞相咽项。
豪曰： 世言李穆、蔡佑，丞相臂膊；耿豪、王勇，丞相咽项。
Geng Hao said:People in the world say that Li Mu and Cai You are like the prime minister's arms; Geng Hao and Wang Yong are like the prime minister's neck.