《旧唐书·列传·卷一百零九》
魏博史宪诚暗怀悖心，裴度以为是老臣负气任性，对他毫不怀疑。
魏博史宪诚，中怀向背，裴度以宿旧自任，待宪诚于不疑。
Shi Xian Cheng of Weibo had his own disloyal intentions but Pei Du did not suspect him because he thought that Shi Xian Cheng was just an old minister who was being arrogant.