《旧唐书·本纪·卷二十》
李茂贞多次请求发布授予招讨使的命令，又给宰相杜让能、中尉西门君遂写信，语句中有指责谩骂的话，凌辱轻蔑王室，昭宗心里不能容忍。
累请招讨之命，兼与宰相杜让能、中尉西门君遂书，词语诟詈，凌蔑王室，昭宗心不能容。
Li Maozhen requested many times that the order conferring the Defense Commissioner rank be issued, and also wrote letters to Prime Minister Du Rangneng and Commander of the Imperial Guards Ximen Junsui, using insulting and abusive language that was disrespectful of the imperial family. Zhaozong found this unbearable.