《国语·吴语·吴晋争长未成勾践袭吴》
那样晋国将会不战而把盟主让给我们，我们掌握了诸侯之长的权柄后，以年成不好为由，不责求诸侯的贡赋，让他们先回国，诸侯们一定会高兴。
彼将不战而先我，我既执诸侯之柄，以岁之不获也，无有诛焉，而先罢之，诸侯必说。
In that way, Jin will give up the leadership of the alliance without a fight, and once we have the authority of the leader of the vassals, we can use the poor harvest as an excuse to not demand tribute from the vassals and let them return to their own countries, and the vassals will certainly be happy.