《资治通鉴·唐纪·唐纪一》
千牛独孤开远带领数百殿内兵到玄览门，敲请求： 武器完备，足以破贼，陛下如能亲自临敌，人情自然安定；否则，祸事就在眼前。 
千牛独孤开远帅殿内兵数百人诣玄武门，叩阁请曰： 兵仗尚全，犹堪破贼。陛下若出临战，人情自定；不然，祸今至矣！ 
The qianniu Du Gu Kai-yuan led hundreds of guards in the palace to the Xuanlan Gate and requested: The weapons are all ready, and it is enough to defeat the rebels. If Your Honor could go out yourself to battle, then the people will become secure. Otherwise, disaster is just around the corner.