《旧唐书·列传·卷五十三》
这年北伐，与奚怒皆在桑干河作战，三次将他打败，俘获其大量人马，耀武漠北，凯旋而归。
是岁北伐，与奚怒皆战于桑乾河，三败之，大虏其众，耀武漠北，高会而旋。
During the Northern Expedition this year, he and Xi Nu fought at the Sanggan River, defeating him three times, capturing a large number of his men and horses, showing off his might in Mobei, and returning in triumph.