《资治通鉴·隋纪·隋纪六》
当初，杨玄感到达东都，自以为天下会响应，他得到韦福嗣后，就视之为心腹，不再完全信任李密了。
始，杨玄感至东都，自谓天下响应，功在朝夕。得韦福嗣，委以心膂，不复专任李密。
At that time, when Yang Xuangan arrived at the Eastern Capital, he thought that all under Heaven would respond. Having obtained Wei Fushen, he considered him to be his confidant, and no longer completely trusted Li Mi.