《资治通鉴·唐纪·唐纪十八》
然后挑选精锐骑兵，轻装前进，日夜兼程突袭李庶匐。进军途中，俘获阿史那都支从李庶匐处返回的使者和与他同行的李庶匐的使者。裴行俭释放李庶匐的使者，让他先去通知李庶匐，说阿史那都支已经就擒，李庶匐便投降了。
简其精骑，轻赍，昼夜进掩遮匐，途中，获都支还使与遮匐使者同来；行俭释遮匐使者，使先往谕遮匐以都支已就擒，遮匐亦降。
Then he collected the elite cavalry, advanced lightly, and made a surprise attack on Li Shufang day and night. During the march, he captured Ashide’s envoy returning from Li Shufang and Li Shufang’s envoy accompanying him. Pei Xingjian released Li Shufang’s envoy, sending him to notify Li Shufang that Ashide had been captured, and Li Shufang immediately surrendered.