《旧唐书·列传·卷一百二十》
裴度为人执著，不改禀性，忠心侍奉皇帝，当时的朝政凡有失误他无不极力进言，因此被奸臣皇甫挑拔离间，使宪宗对裴度心生不悦。
度执性不回，忠于事上，时政或有所阙，靡不极言之，故为奸臣皇甫镈所构，宪宗不悦。
Pei Du was a persistent person, and would not change his disposition. He served the emperor with loyalty. At that time, whenever there were mistakes in court affairs, he would always put his arguments forward. Hence, he came to be slandered by the treacherous minister Huangfu, who made Emperor Xianzong displeased with him.