《旧唐书·列传·卷六十五》
乾元二年十月，叛贼史思明派将领李归仁率三千名铁骑进犯，伯玉以数百名骑兵在疆子坂将其打败，尸横遍野，获得战马六百匹，归仁和其残部向东逃走。
乾元二年十月，逆贼史思明遣伪将李归仁铁骑三千来犯，伯玉以数百骑于疆子坂击破之，积尸满野，虏马六百匹，归仁与其党东走。
In October of the second year of the Dali period, rebellious general Shi Siming sent general Li Guiren leading 3,000 iron riders in an invasion. Boyu led a few hundred riders in repelling them in Jiangziban. Corpses laid on the ground, and they acquired six hundred warhorses, Guiren and the remnants of his army fled to the east.