《史记·七十列传·平津侯主父列传》
武帝认为公孙弘谦让有礼，越发厚待他，终于让公孙弘当了丞相，封为平津侯。
天子以为谦让，愈益厚之。卒以弘为丞相，封平津侯。
Emperor Wu thought that Gongsun Hong was modest and courteous, so he treated him with increasing favor. In the end, he made Gongsun Hong the prime minister and bestowed the title of Marquis of Pingjin on him.