《辽史·列传·卷六》
太宗暗地里从别的渡口渡河，留下延寿与耶律朔古据守桥梁，敌人不能夺取，且屡败于延寿，杜重威举全军投降。
太宗潜由他渡济，留延寿与耶律朔古据桥，敌不能夺，屡败之，杜重威扫厥众降。
Emperor Taizong himself secretly crossed the river by another crossing, leaving Yanshou and Yelü Suogu to occupy the bridge. The enemy could not seize it, and were repeatedly defeated by Yanshou. Du Chongwei surrendered with all of his troops.