《资治通鉴·唐纪·唐纪七》
壬申，高祖将亲笔诏书赐给裴寂等人说： 朕应当加上太上皇的尊号。 
壬申，上以手诏赐裴寂等曰： 朕当加尊号为太上皇。 
Ren Shen, Emperor Gaozu granted the imperial edict written in his own hand to Pei Ji and said: I should be given the honorary title of the Supreme Emperor.