《北史·列传·卷十六》
不如暗地答应盖吴的两个叔叔，不为难他们的妻子儿女，让他们去追杀盖吴。 
不如私许吴叔，免其妻子，使自追吴。 
It would be better to secretly agree with Gai Wu's two uncles, to let their wives and children go free, and let them pursue and kill Gai Wu.