《新唐书·列传·卷一百四十一》
吐蕃屯兵对面高山，凌高直逼唐营。左领军将军黑齿常之率敢死士五百人，夜劫吐蕃营，虏贼惊，溃乱中自相蹂践而死的甚多，引兵退走，敬玄仅得脱身。
敬玄顿承风岭，碍险不得纵，吐蕃压王师屯，左领军将军黑齿常之率死士五百，夜斧其营，虏惊，自相轥藉而死者甚众，乃引去。敬玄仅脱。
Tubo deployed troops on the opposite mountain, aiming at Tang's camp. General of the Left Army, Hei Chi Changzhi led 500 dare-to-die soldiers to raid Tubo's camp at night. The captors were shocked, and many died in the ensuing chaos. The troops retreated, and Jingxuan barely escaped.