《旧唐书·本纪·卷二十》
大顺元年春，正月初一，皇上驾临武德殿接受百官朝贺。
大顺元年春正月戊子朔，御武德殿受朝贺。
In the spring of the first year of Dashun, on the first of January, the Emperor arrived at the Wude Hall to receive the New Year greetings from all the officials.