《汉书·传·杨胡朱梅云传》
汉元帝的时候，琅邪郡人贡禹任御史大夫，代理华阴县丞嘉向皇帝上呈密封的奏章，说： 治理的办法在于得到贤才，御史大夫是副宰相，位在九卿之上，不能不挑选。
元帝时，琅邪贡禹为御史大夫，而华阴守丞嘉上封事，言 治道在于得贤，御史之官，宰相之副，九卿之右，不可不选。
During the reign of Emperor Yuan of the Han Dynasty, Gong Yu, a native of Langya County, served as Yushi Daifu and, acting as an official of Huayin County, submitted a sealed memorial to the emperor, saying: The way to govern is to get talented people, and the Yushi Daifu is the deputy prime minister, who is above the nine ministers, and cannot be selected.