《吴子·应变》
吴起答： 在平坦地形上避免和它作战，而要在险要地形上截击它，所以说，以一击十，最好是利用狭窄隘路；以十击百，最好是利用险要地形；以千击万，最好是利用阻绝地带。
起对曰： 避之于易，邀之于阨。故曰：以一击十，莫善于阨；以十击百，莫善于险；以千击万，莫善于阻。
Wu Qi replied, “On level ground, avoid fighting and try to intercept the enemy on difficult terrain. Thus, to fight one to ten, a narrow pass is best; to fight ten to one hundred, difficult ground is best; to fight one thousand to ten thousand, places where escape is difficult are best.”