《旧五代史·后晋·少帝纪二》
二日，沧、恒、贝、邺四州驰马飞告，契丹前锋赵延寿、赵延昭带领五万骑兵入侵，马上就要抵达甘陵了，这是青州杨光远招来的。
乙亥，沧、恆、贝、鄴驰告，契丹前锋赵延寿、赵延昭引五万骑入寇，将及甘陵，青州杨光远召之也。
On the 2nd, four prefectures, Cangzhou, Hengzhou, Beizhou, and Yezhou, reported by mounted messengers that Khitan vanguard generals Zhao Yan Shou and Zhao Yan Zhao led 50,000 cavalry to attack, and were about to reach Gan Ling, and it was Yang Guangyuan of Qingzhou who had brought this upon them.