《汉书·传·公孙弘卜式儿宽传》
回朝汇报时，他极力反对交通西南夷，认为没有用处，皇上没有听从他的意见。
还奏事，盛毁西南夷无所用，上不听。
When he returned to report, he vigorously opposed having any dealings with the tribes of the Southwest, saying that it would be useless, and the emperor did not follow his advice.