《新唐书·本纪·卷八·穆宗 敬宗 文》
大中九年正月初四，成德军节度使王元逵去世，其子王绍鼎自称留后。
九年正月甲申，成德军节度使王元逵卒，其子绍鼎自称留后。
On the fourth day of the first month of the ninth year of Dazhong, Wang Yuankui, the military governor of Chengde, died, and his son Wang Shaoding proclaimed himself acting governor.