《资治通鉴·后晋纪·后晋纪六》
契丹主每次经过城下都指着易州城叹道： 我能够吞并天下，却被此人所扼阻！ 
契丹主每过城下，指而叹曰： 吾能吞并天下，而为此人所扼！ 
Every time the Khitan leader passed under the city walls, he would point to Yizhou and sigh: "I can swallow the world, but this man blocks my way."