《战国策·秦二·甘茂相秦》
甘茂因而去见秦武王说： 大王得到了贤能的国相，让我向您行再拜礼表示祝贺。 
甘茂因入见王曰： 王得贤相，敢再拜贺。 
Gan Mao therefore went to see King Wu of Qin and said: Your Majesty has obtained a virtuous prime minister, let me bow to you twice to congratulate you.