《金史·列传·卷十二》
宗翰又禀奏说 ：先皇帝最初征伐辽国的时候，企望宋国能同力夹攻，因此把燕的土地许给他们。
宗翰复奏曰： 先皇帝征辽之初，图宋协力夹攻，故许以燕地。
Zong Han reported again and said: “When the former emperor initially fought against the Liao, he hoped that Song would be able to join forces with him, and therefore granted them land in Yan.”