《资治通鉴·后晋纪·后晋纪四》
邵珂怨恨，暗中派人跑到契丹，说： 贝州粮食多而兵力弱，容易攻取。 
珂怨望，密遣人亡入契丹，言 贝州粟多而兵弱，易取也。 
Shao Ke harbored a grudge, and secretly sent a man to the Khitan, saying: Beizhou is full of food but short on troops, it would be easy to take.