History of the Peloponnesian War

We then, having fallen under the rule which we propounded ourselves at Lacedaemon, that every one should punish his own allies, now claim to receive the same from you; and not that you, after being benefited by our vote, should harm us by yours. Make us then a fair return;

knowing that this is that very crisis, in which he that helps is most a friend, and he that opposes, a foe.

And for these Corcyraeans, neither receive them as allies in spite of us, nor help them in doing wrong.