《元史·本纪·卷三》
宪宗九年春，正月初一，皇帝驻跸在重贵山的北面，设置酒宴举行盛大宴会，于是对诸侯王、驸马和百官说： 现在我们在宋朝境内，夏季的暑热快要来了，你们认为可不可以住下去呢？ 
九年己未春正月乙巳朔，驻跸重贵山北，置酒大会，因问诸王、驸马、百官曰： 今在宋境，夏暑且至，汝等其谓可居否乎？ 
In the spring of the ninth year of Xianzong, on the first day of the first month, the emperor stopped at Beifang of Zhongguishan and held a grand banquet. He said to the princes, in-laws, and civil and military officials, "Now that we are in the territory of the Song Dynasty and the summer heat is approaching, do you think it is okay to stay?"