History of the Peloponnesian War

Whereupon, many, fearing such an intention, applied themselves to the Argives, every one severally striving to come into their league.

The Lacedaemonians, perceiving this stir to begin in Peloponnesus, and that the Corinthians were both the contrivers of it and entered themselves also into the league with Argos, sent ambassadors unto Corinth with intention to prevent the sequel of it: and accused them both for the whole design and for their own revolt in particular, which they intended to make from them to the league of the Argives, saying that they should therein infringe their oath and that they had already done unjustly to refuse the peace made with the Athenians; forasmuch as it is an article of their league that what the major part of the confederates should conclude, unless it were hindered by some god or hero, the same was to stand good.

But the Corinthians, those confederates which had refused the peace as well as they being now at Corinth (for they had sent for them before), in their answer to the Lacedaemonians did not openly allege the wrongs they had received; as that the Athenians had not restored Solium nor Anactorium nor anything else they had in this war lost; but pretended not to betray those of Thrace, for that they had in particular taken an oath to them, both when together with Potidaea they first revolted and also another afterwards.