《资治通鉴·晋纪·晋纪三十六》
姚兴说： 刘勃勃依靠一群乌合之众，还能把他打败，何况我要发动天下所有的兵马来对付他呢？ 
兴曰： 刘勃勃以乌合之众犹能破之，况我举天下之兵以加之乎！ 
Yao Xing said: Liu Bobo relies on a group of mobs, and he can still be defeated, let alone if I mobilize all the troops in the world to deal with him?