《资治通鉴·晋纪·晋纪三十八》
于是率领七千名骑兵去袭击乙弗，并将它打得大败，缴获了马、牛、羊等四十多万。
乃帅骑七千袭乙弗，大破之，获马牛羊四十馀万。
So he led seven thousand cavalry to attack Yifu, and defeated them badly, capturing more than 400,000 horses, cattle, and sheep.