《资治通鉴·唐纪·唐纪四十一》
德宗书面答复他，大概是说： 这不仅仅说中了朕的痛处，也能成朕之美，朕哪敢不听从大道理而改变先帝的遗愿！ 
上答诏，略曰： 非唯中朕之病，抑亦成朕之美，敢不闻义而徙！ 
Tang Dezong replied in writing, which said: You have both spoken to my pain and praised me, how dare I not listen to the great reason and change the late emperor's will!