《辽史·本纪·卷二十四》
六月初九，诏令每月以及每年的寒食节在观德殿举行祭祀活动，每逢各位先帝的生辰及忌日，则前往景宗御容殿进献祭品。
六月甲子，诏月祭观德殿，岁寒食，诸帝在时生辰及忌日，诣景宗御容殿致奠。
On the 9th of the sixth lunar month, an imperial edict ordered that sacrifices be held in the Guande Hall every month and on the Cold Food Festival every year, and that offerings be made in the Jingzong Royal Portrait Hall on the birthdays and death anniversaries of each of the former emperors.