《新唐书·列传·卷六十九》
就率三百名骑兵为奇兵，沿着南山，从对方阵后杀出夹攻他们。裴罫的军队几乎被消灭光了，他自己脱身逃跑，到了申口，被抓住了，送到京城。
乃以三百骑为奇兵，旁万山，出其背夹击之，其众几尽，脱身走，至申口，禽之，送京师。
Then he led three hundred cavalrymen to form a surprise force, following along the slope of Nanshan. From behind the enemy's formation they emerged to attack them. Pei Kou's troops were nearly wiped out, and he escaped alone. He reached Shenkou, where he was captured and sent to the capital.