《战国策·魏四·成阳君欲以韩魏听秦》
自圭对魏王说： 大王不如暗中派人劝成阳君说： 您进入秦国，秦国一定会扣留您来达到从韩国多割取土地的目的。
白圭谓魏王曰： 王不如阴侯人说成阳君曰： 君入秦，秦必留君，而以多割与韩矣。
Zi Gui said to King Wei, "Your Majesty, you might as well secretly send someone to persuade Chengyangjun and tell him that once you enter Qin, Qin will definitely detain you to achieve the goal of seizing more land from Han."