《宋史·列传·卷一百二十四》
岳飞考察其中可以利用的人，用恩惠结交然后将他们遣回金军，让他们在夜间攻打敌营纵火焚烧，岳飞乘乱直击，大败金军。
察其可用者，结以恩遣还，令夜斫营纵火，飞乘乱纵击，大败之。
Yue Fei examined those who could be used, befriended them with kindness, and then sent them back to the Jin army. They attacked the enemy camp at night and set it on fire. Yue Fei took advantage of the chaos to strike directly, and Jin army was defeated.