《资治通鉴·唐纪·唐纪六十五》
唐宣宗说： 如果你奉朕的敕命办公事，骄横也还可以；岂能私自了宫而不躲避宰相的马呢！ 
上曰： 汝衔敕命，横绝可也，岂得私出而不避宰相乎！ 
Tang Xuanzong said: If you are carrying out your duty with my permission, it is understandable that you are arrogant. Besides that, how can you avoid the ministers when you are not carrying out any duty? 