《周书·列传·卷十四》
贺拔岳缓缓推进，原来埋伏下的骑兵随贺拔岳前进，骑兵人数逐渐增多，贼人猜不出有多少。
岳渐前进，先所置骑随岳而进，骑既渐增，贼不复测其多少。
He Bayue advanced slowly and the cavalrymen he had hidden earlier followed him forward, the number of cavalrymen gradually increasing and the raiders unclear on how many there were.