《汉书·传·儒林传》
当时光禄勋王龚以外家亲属做内卿，和奉车都尉刘歆一起校书，三人都是侍中。
时，光禄勋王龚以外属内卿，与奉车都尉刘歆共校书，三人皆侍中。
At that time, the Colonel of the Guard, Wang Gong, was related to the empress by marriage and was in charge of the imperial library along with the General of Chariots, Liu Xin; all three were Consultants to the Emperor.