《汉书·传·何武王嘉师丹传》
我私下里见梁相等人以前处理平王的案件，并不认为刘云不该死，祇是涉及到公卿的事要显示慎重；备置驿马转送囚犯，势必不能超过冬月，确实不见他们内外观望阿附刘云的证据。
窃见相等前治东平王狱，不以云为不当死，欲关公卿示重慎；置驿马传囚，势不得逾冬月，诚不见其外内顾望阿附为云验。
“When I privately saw Liang Xiang et al. previously handle the case of the Prince of Ping, I did not believe that Liu Yun should not die, but that it was necessary to be cautious in matters concerning the high officials; there was no alternative but to have post horses ready to transfer the prisoner, and there was certainly no evidence of them either outwardly or inwardly observing and flattering Liu Yun.”