《资治通鉴·唐纪·唐纪六十七》
恰值桂管观察使李丛调往湖南镇守，新任观察使尚未到任，秋季，七月，许佶等人发动叛乱，杀死都将王仲甫，推举粮料判官庞勋为主帅，抢劫军用仓库的兵器，武装起来结队北还，他们在所过之地四处劫掠，地方州县不能抵卸。
会桂管观察使李丛移湖南，新使未至。秋，七月，佶等作乱，杀都将王仲甫，推粮料判官庞勋为主，劫库兵北还，所过剽掠，州县莫能御。
It happened that the governor of Guiguanxi, Li Cong, was transferred to Hunan to defend. The new governor had not yet taken office. In autumn, in July, Xu and others launched a rebellion, killed the general Wang Zhongfu, promoted the chief grain judge Pang Xun as the commander-in-chief, robbed weapons from the military warehouse, armed and formed a team to return north, and plundered everywhere they went. The local county and county could not dismount.