《资治通鉴·唐纪·唐纪四十二》
当初，马妒忌泾原都知兵马使李晟的功绩与声名，派遣李晟入朝宿卫，李晟担任了右神策军都将的职务。
遂留宁。初，马璘忌泾原都知兵马使李晟功名，遣入宿卫，为右神策都将。
At the beginning, Ma was jealous of the achievements and fame of Li Sheng, the military governor of Jingyuan. He sent Li Sheng to the imperial court to be a guard. Li Sheng took charge of the You Shence Army.