《资治通鉴·唐纪·唐纪四十二》
建中二年春季，正月，戊辰，成德节度使李宝臣去世。
建中二年辛酉，公元七八一年春，正月，戊辰，成德节度使李宝臣薨。
In the spring of the second year of Jianzhong, in the first month, on the day of wuchen, Li Baochen, the Jiedushi of Chengde, died.