《左传·哀公·哀公九年》
吴王说： 去年我听到君王的命令，现在又改变了，不知道该听从什么，我准备到贵国去接受君王的命令。 
吴子曰： 昔岁寡人闻命，今又革之，不知所从，将进受命于君。 
King Wu said: Last year I heard your Majesty's order, but now it has changed, and I don't know what to follow. I am going to your country to accept your Majesty's order.