《魏书·列传·卷八十三》
太祖派步骑兵三万余人，渡河到蒙坑南面四十里之处，从背后袭击姚兴。
太祖以步骑三万余人，渡蒙坑南四十里，逆击兴。
Emperor Taizu sent more than 30,000 infantry and cavalry to cross the river and attack Yao Xing from behind forty miles south of Mengkeng.