《资治通鉴·晋纪·晋纪十八》
慕容派慕容恪在密云山埋伏七千精锐骑兵，在三藏口大败麻秋的军队，死亡人数达十分之六七。
皝遣慕容恪伏精骑七千于密云山，大败麻秋于三藏口，死者什六七。
Murong sent Murong Ke to place 7,000 elite cavalry in ambush in Miyun Mountain, and thoroughly defeated Ma Qiu's army in Sānzāngkǒu, killing over two-thirds of their number.