《资治通鉴·后周纪·后周纪四》
吴越巡逻士兵将情况报告，吴程说： 两国交战，使者可以在其间来往，不可随便怀疑。 
吴越逻者以告，程曰： 兵交，使在其间，不可妄以为疑。 
Wuyue's patrol soldiers reported the situation, and Wu Cheng said: "When two countries are at war, envoys can still come and go freely. We shouldn't suspect them without reason."