《史记·三十世家·魏世家》
从前，合纵汉有成功，是由于楚、魏互相猜疑，而韩国又不可能参加盟约。
异日者，从之不成也，楚、魏疑而韩不可得也。
In the past, the success of the Vertical Alliance Han was due to the suspicion between Chu and Wei, and Korea could not participate in the alliance.