《资治通鉴·后周纪·后周纪三》
与朕只有一水之隔，却未曾派遣过一位使者来建立友好关系，反而飘洋过海去勾结契丹，舍弃华夏而臣事蛮夷，礼义在哪里呢？
与朕止隔一水，未尝遣一介修好，惟泛海通契丹，舍华事夷，礼义安在？
“You are only separated from me by a river, but you have never sent an envoy to establish friendly relations. Instead, you have gone overseas to collude with Liao. You have abandoned the Chinese Civilization and become a vassal to the barbarian. Where is the etiquette?”