《资治通鉴·唐纪·唐纪十八》
听说刘审礼战败被俘，他又狼狈后撤，驻扎在承风岭，利用泥沟自我防卫，吐蕃屯兵高岗，居高临下向他施加压力。
闻审礼战没，狼狈还走，顿于承风岭，阻泥沟以自固，虏屯兵高冈以压之。
Hearing that Liu Shenli had been defeated and captured, he retreated in disgrace, stationed at Chengfengling, and used the mud ditch for self-defense. The Tufan stationed troops on the high ground, overlooking him and putting pressure on him.