《宋史·列传·卷一百四十五》
隆兴年间朝廷与金再次议和，忘了议定受书的礼仪，皇上曾感到后悔。
隆兴再讲和，失定受书之礼，上尝悔之。
During the Longxing period, the court and the Jins negotiated peace again. They forgot to agree on the etiquette to receive letters, which the emperor regretted.