《资治通鉴·唐纪·唐纪五十三》
起重光大荒落，尽旃蒙作噩，一共五年。唐宪宗元和元年春季，正月，丙寅朔，宪宗率领群臣来到兴庆宫，向太上皇进献尊号。
春，正月，丙寅朔，上帅群臣诣兴庆宫上上皇尊号。
From the great desolation of Qizhongguang to the nightmares of Zhidianmeng, a total of five years passed. In the spring of the first year of Emperor Xianzong of Tang Dynasty, in the first month, on the first day of the first month, Emperor Xianzong led the ministers to Xingqing Palace to present the title of the Supreme Emperor.