《旧唐书·本纪·卷七》
十八日，皇上驾到兵部尚书韦嗣立的庄园，封韦嗣立为逍遥公，皇上亲自作序言赋诗，顺便游玩了白鹿观。
庚子，幸兵部尚书韦嗣立庄，封嗣立为逍遥公，上亲制序赋诗，便游白鹿观。
On the 18th, the emperor arrived at the manor of the Minister of the Ministry of War, Wei Sili. Wei Sili was named Xiaoyao Gong. The emperor personally wrote a preface and poem, and took the opportunity to visit Bailuguan.