《旧唐书·本纪·卷十六》
中书门下省上奏说燕州、蓟州等八州被平定，按照礼制应当祭告先皇陵寝和太庙，皇上允从。
中书门下奏燕、蓟八州平，准礼宜告陵庙，从之。
The Central Secretariat reported that eight prefectures including Yan Prefecture and Ji Prefecture had been pacified, and proposed performing rituals in accordance with custom at the Imperial Mausoleum and Ancestral Temple. The Emperor granted permission.