《旧唐书·本纪·卷十四》
京兆尹许孟容和谏议官员们当面议论，征讨叛逆是件大事，不能够把内官任命为将帅，补阙独孤郁的言辞最为激烈率直。
京兆尹许孟容与谏官面论，征伐大事，不可以内官为将帅，补阙独孤郁其言激切。
Jingzhao Yin Xu Mengrong and impeached officials discussed face to face that quelling bandits was a great matter, we cannot appointed eunuchs to be generals, Bu Que Duguyu’s words were the most intense and upright