《汉书·传·公孙弘卜式儿宽传》
于是他向皇上谢罪说： 我是山东粗鄙之人，不了解设朔方郡如此有利，希望罢去西南夷、苍海郡，而专一经营朔方郡。 
弘乃谢曰： 山东鄙人，不知其便若是，愿罢西南夷、苍海，专奉朔方。 
Then he apologized to the emperor and said, "I am a crude man from Shandong and do not understand the benefits of establishing the Shuo Fang Commandery. I hope that the Southwest Yi and the Cang Hai commanderies can be abolished, and that we can focus on the operations of the Shuo Fang Commandery.