《旧唐书·本纪·卷十五》
十月二十一日，制令： 朕继承皇帝的宝位，到现在已经十年了。
甲子，制： 朕嗣膺宝位，于兹十年。
On the 21st of the 10th month, an edict was issued: Since my accession to the throne ten years ago, I have ever exerted my utmost sincerity to govern the country and achieve peace and harmony through humane teachings. Night and day, I have toiled for this purpose.