《资治通鉴·唐纪·唐纪七十三》
牙将李宗礼说： 敌我人数相差太大，我们应当加固壁垒自我坚守，再慢慢图谋把军队迁回。 
牙将李宗礼曰： 众寡不敌，宜坚壁自守，徐图还师。 
 The military advisor Li Zongli said: The enemies outnumber our forces by far. We should fortify the defensive wall, defend ourselves, and then plan how to gradually transfer the troops back.