《北史·本记·卷十一》
但他接着便私下对杨坚说 ：您必定成为天下国君，必须经过一番大杀戮而后天下安定。 
既而私谓帝曰： 公当为天下君，必大诛杀而后定。 
However, Lai He then secretly told Yang Jian in private: "You will definitely become the sovereign of the world, but it will require a great deal of bloodshed before the world can be pacified."