《资治通鉴·魏纪·魏纪二》
鲜卑族酋长轲比能诱杀另一酋长步度根的兄长扶罗韩，因此步度根十分怨恨轲比能，二人率部互相攻击。
鲜卑轲比能诱步度根兄扶罗韩杀之，步度根由是怨轲比能，更相攻击。
The Xianbei leader Kebineng tricked and murdered the older brother, Fuluohan, of another leader Budugen so Budugen came to deeply resent Kebineng; the two led their forces to attack each other.