History of the Peloponnesian War

the Plataeans do not admit that they promised to restore the men at once, but only that they would do so in case they should come to an agreement after preliminary negotiations, and they deny that they swore to it.

At any rate, the Thebans withdrew from their territory without doing any injury; but the Plataeans, as soon as they had hastily fetched in their property from the country, straightway slew the men. And those who had been taken captive were one hundred and eighty in number, one of them being Eurymachus, with whom the traitors had negotiated.

When they had done this, they sent a messenger to Athens, gave back the dead under a truce to the Thebans, and settled the affairs of the city as seemed best to them in the emergency.