《史记·七十列传·孙子吴起列传》
田忌想要率领救兵直奔赵国，孙膑说： 想解开乱丝的人，不能紧握双拳生拉硬扯；解救斗殴的人，不能卷进去胡乱搏击。要扼住争斗者的要害，争斗者因形势限制，就不得不自行解开。
田忌欲引兵之赵，孙子曰： 夫解杂乱纷纠者不控卷，救斗者不搏撠，批亢捣虚，形格势禁，则自为解耳。
Tian Ji wanted to lead the rescue troops straight to the State of Zhao. Sun Bin said: "Those who want to unravel the tangled thread cannot clenched their fists and pull it hard; those who rescue the fighting people cannot get involved in the fight. You need to seize the key point of the fighters, and the fighters will have to unravel it themselves due to the situation.