《智囊(选录)·明智部·魏相》
为此，御史大夫魏相借平恩侯许伯之事，用皂囊封缄，向宣帝呈进了一封密信。信中说： 《春秋》这部书是指责一个家族世代承袭卿大夫这种非礼现象的，它讨厌宋国的襄公、成公、昭公三世都娶大夫之女，因礼不臣妻之父母，所以去掉了大夫之名，致使公族以弱，妃党益强。也厌恶鲁国季孙氏世专鲁政，认为这些都是危乱国家的。
宪果以骄纵败。魏相因平恩侯许伯奏封事，言： 《春秋》讥世卿，恶宋三世无大夫，及鲁季孙之专权，皆危乱国家。
Accordingly, Grand Censor Wei Xiang took advantage of the incident of Marquis Ping’en Xu Bo and used a soap bag to seal a secret letter that he presented to Emperor Xuan. The letter said: The “Spring and Autumn Annals” criticizes the phenomenon of a family inheriting the title of Duke or Minister through generations as a violation of etiquette. It despises the fact that Marquis Xiang, Marquis Cheng and Marquis Zhao of the Song state all married the daughters of ministers. Because it is not ethical to be the husband of one’s wife's parents, their titles of ministers were removed and this caused the royal family to become weak and the wives' families to become strong. It also despises the fact that the Jisun family of the Lu state controlled the government of the Lu state for generations, because these things endanger the state.