《资治通鉴·唐纪·唐纪五十三》
或许是他的同事中有人打算独揽朝廷大政，嫉妨郑得到宠信，居己之先吧，希望陛下再深入验察此事，不要让人说陛下是在听信谗言啊！ 
或者同列欲专朝政，疾宠忌前，愿陛下更熟察之，勿使人谓陛下信谗也！ 
“Perhaps it was some of his colleagues who wanted to dominate the affairs of the imperial court, and they envied the emperor's favoritism towards him, wishing that they could rise above him. May Your Majesty investigate this matter further so as not to let people say that Your Majesty is listening to slander.”