《资治通鉴·唐纪·唐纪七十六》
于是，李克用上表朝廷奏称： 我统领着大军，不敢随意进入京城拜见皇上，并且担心所部士兵会侵扰渭水以北的居民。 
乃表称： 臣总帅大军，不敢径入朝觐，且惧部落士卒侵扰渭北居人。 
Thus, Li Keyong submitted a memorial to the court, stating: I am leading a large army and do not dare to enter the capital to pay homage to the emperor without permission. I am also worried that my soldiers will disturb the people north of the Wei River.