《史记·三十世家·魏世家》
范痤于是给信陵君上书说： 范痤是过去魏国免职的宰相，赵国用割地为条件要求杀我，而魏王竟听从了，如果强秦沿用赵国的办法对待您，那么您将怎么办？ 
痤因上书信陵君曰： 痤，故魏之免相也，赵以地杀痤而魏王听之，有如彊秦亦将袭赵之欲，则君且柰何？ 
Fansuo then wrote a letter to Lord Xinling, and said: “Fansuo is the ex-Prime Minister that was dismissed by Wei. Zhao wants to kill me as a condition of giving us land, and the King of Wei actually agreed. If Qin adopts the same approach as Zhao and treats you the same way, then what are you going to do?”