《资治通鉴·唐纪·唐纪六十七》
庞勋坐于徐州观察使府处置军政大事，卫兵整整齐齐地排列，文武将吏行跪拜礼，没有人敢抬头正视厅堂上的主帅庞勋。
勋坐听事，盛陈兵卫，文武将吏伏谒，莫敢仰视。
Pang Xun was handling military and government affairs in the Xuzhou Observation Mission. The guards were standing neatly and the civil and military officials knelt to pay homage. Nobody dared to look at the commander Pang Xun in the hall.