《汉书·传·张陈王周传》
大王如果能拿出几万斤金，进行反问，离间他们的君臣，使他们生疑，项王为人猜忌，听信谗言，必然内部相杀。
大王能出捐数万斤金，行反间，间其君臣，以疑其心，项王为人意忌信谗，必内相诛。
If Your Majesty can get hundreds of thousands of gold to sow discord among them and make them suspicious through counterarguments, Xiang Yu is a suspicious person who listens to rumors, so they will definitely kill each other internally.