《周书·列传·卷五十》
魏废帝元年正月，土门出兵进攻茹茹，于怀荒北面大破之。
魏废帝元年正月，土门发兵击茹茹，大破之于怀荒北。
In the first month of the first year of the Emperor Wei Fei, Tumen dispatched troops to attack the Rouran and defeated them at Huaihuang Bei.