《太平广记·卷三十七·神仙三十七》
唐朝大历年间，代宗皇帝在白天睡觉，梦见一个人对他说： 西岳太华山中，有一个皇帝坛，你为什么不派人去寻访，而祭它拜它呢？那样就能得到极大的福荫。 
唐代宗皇帝大历中，因昼寝，常梦一人谓曰： 西岳太华山中，有皇帝坛，何不遣人求访，封而拜之，当获大福。 
During the Dali years of the Tang Dynasty, Emperor Daizong was sleeping during the day when he dreamt of a person who said to him, "There is an emperor's altar in Mount Taihua in the Western Mountains. Why don't you send someone to visit it and worship it? That way you will receive great blessings."