《淮南子·齐俗训》
王子比干不是不知道如像箕子那样披头散发、装疯卖傻可以保全自己，但他就是乐意以直行尽忠来为节义献身，所以他不像箕子那样装疯卖傻。
王子比干非不知箕子被发佯狂以免其身也，然而乐直行尽忠以死节，故不为也。
Prince Bigan was not unaware that he could preserve himself like Jizi, with his hair disheveled and pretending to be a fool. He simply preferred to die for integrity and loyalty, and so he did not pretend to be a fool like Jizi.