《宋史·列传·卷二百三十一》
士兵中有人持矛夺取金国使臣的羔羊，金人不敢抗争，接伴使上奏说郭药师威名远震，蔡攸更认为他可依靠，因此宋在内地不再做防备。
乡兵或持矛揭取其羊羜，皆不敢争，奏言药师威声远振，攸益谓其可倚，故内地不复防制。
Some soldiers held spears to seize the Jin envoy’s lamb. The Jin envoy dared not fight back. The accompanying envoy played up and said that Guo Yaoshi’s reputation was far-reaching. Cai You believed that he could be relied on, so the Song Dynasty no longer prepared for defense.