《后汉书·列传·李固列传》
李固、胡广、赵戒以及大鸿胪杜乔都认为清河王刘蒜明德著闻，又是最尊亲，应立为嗣。
固、广、戒及大鸿胪杜乔皆以为清河王蒜明德著闻，又属最尊亲，宜立为嗣。
Li Gu, Hu Guang, Zhao Jie, as well as Great Minister of Ceremonies Du Qiao all believed that Prince Qinghe Liu Suan was famous for his virtuous deeds, and he was also the most esteemed and dear relative, and he should be established as the heir.