《旧唐书·列传·卷一百二十二》
咸通九年，从徐州调至边防军队的武宁军节度粮料判官庞勋擅自从桂州返回。
九年，徐州戍兵庞勋自桂州擅还。
In the ninth year of Xianming's reign period, Pang Xun, who had once served as the Supervisor of the Army Grain Supplies of the Wuning Jiedushi, the frontier army in Xuzhou, returned from Guizhou without authorization.