History of the Peloponnesian War

Now since the lot fell to the Lacedaemonians to make restoration first of the positions they held, they straightway set at liberty the prisoners of war that were in their hands, and sending Ischagoras, Menas, and Philocharidas as envoys to Thrace ordered Clearidas to give up Amphipolis to the Athenians, and the rest of the allies to accept the treaty, as it had been prescribed for each.

But the latter were unwilling to do so, as they thought that the terms were unfavourable to them; and Clearidas, to oblige the Chalcidians, did not give up Amphipolis, saying that he was unable to give it up against their will.

And he hastened in person, with envoys from the place, to Lacedaemon, in order to defend himself in case Ischagoras and his colleagues should accuse him of disobedience; and he wished also to learn whether the agreement could still be changed. But when he found that they were already bound by oath, he himself went back again in haste, with orders from the Lacedaemonians to give up Amphipolis if possible, or at all events to fetch away whatsoever Peloponnesians were in it.