《史记·七十列传·樗里子甘茂列传》
您靠什么来与他们相区别呢？人们都说楚国是个善于权变的国家，您一定会在与楚国结交上栽跟头，这是自惹麻烦。
人皆言楚之善变也，而公必亡之，是自为责也。
What do you distinguish yourself from them by? People all say that the State of Chu is a country that is good at expediency. You will definitely fall on your face in your dealings with the State of Chu. This is asking for trouble.