《汉书·传·公孙刘田王杨蔡陈郑传》
皇上召见蔡义，让他讲论《诗经》，皇上听了很满意，提拔他为光禄大夫、给事中，进宫教授汉昭帝。
上召见义，说《诗》，甚说之，擢为光禄大夫给事中，进授昭帝。
The emperor summoned Cai Yi and had him read the Book of Poetry; the emperor was very pleased after listening to him, and promoted him to Guanglu Daifu and an official who served the Emperor, and entered the palace to teach Emperor Zhao of Han.