《旧唐书·本纪·卷十五》
元和十三年春，正月初一，皇上驾临含元殿接受群臣朝贺，仪式完毕，皇上临幸丹凤楼，诏令大赦天下。
十三年春正月己酉朔，御含元殿受朝贺，礼毕，御丹凤楼，大赦天下。
In the spring of the 13th year of Yuanhe, on the first day of the first month, the emperor arrived in Hanyuan Hall to accept the felicitations of the ministers. After the ceremony, the emperor visited the Danfeng Tower and ordered an amnesty for the whole country.