《百战奇略·第八卷·必战》
司马懿耐心解释说： 上庸之战，孟达当时兵少而粮食够吃一年，我军将士数相当孟达军的四倍，但粮食则不够一个月食用，以仅有一个月存粮的部队去与有一年存粮的敌人相较量，怎么可以不采取速战速决？
懿曰： 达众少而食支一年；吾将士四倍于达而粮不淹月，以一月较一年，安可不速？
Sima Yi patiently explained: In the Battle of Shangyong, Meng Da had few soldiers but enough food to last a year, while our soldiers were four times as many as Meng Da's army, but only had enough food for less than a month, how could we not adopt a quick-and-decisive strategy to fight against an enemy with a year's worth of food with only a month's worth of supplies?