《新五代史·列传·梁臣传第十》
这时，梁已打败朱瑾等人，全部占据充、郓二州，任命葛从周为兖州节度使，葛从周在外带兵，刘郡于是派人担着油在城中卖，详细侦察城中虚实和进出要道。
是时，梁已破硃瑾等，悉有兗、郓，以葛从周为兗州节度使，从周将兵在外，掞乃使人负油鬻城中，悉视城中虚实出入之所。
at just this time, when Liang had already defeated Zhu Jin and the others and occupied the two prefectures of Chong and Yun and had appointed Ge Congzhou governor of Yan Prefecture, who was then away with his army, had sent men to parade in the capital selling oil, the better to spy on the state of the defenses and the routes in and out.