《三国志·蜀书·庞统法正传》
郑度劝说刘璋说： 刘备率军远来偷袭我军，士兵不足万，百姓没有全然归附他，都是依靠征集民间的物资，军队也没有粮草辎重。
郑度说璋曰： 左将军县军袭我，兵不满万，士众未附，野谷是资，军无辎重。
Zheng Du persuaded Liu Zhang and said: Liu Bei led his troops from afar to attack our army. There are less than 10,000 soldiers, and the people have not fully surrendered to him. They all rely on confiscating civilian supplies, and the army has no food or supplies.