《韩非子·说林下》
公孙弘改变中原礼俗，剪短了头发去做越王的骑士，公孙喜派人宣布和他断交，说： 我不再和你保持兄弟关系了。 
公孙弘断发而为越王骑，公孙喜使人绝之曰： 吾不与子为昆弟矣。 
Gongsun Hong changed the customs of the Central Plains, cut his hair short to become the King of Yue's knight, Gongsun Xi sent someone to announce that he would break up with him and said: I will no longer keep my brother's relationship with you.