History of the Peloponnesian War
Thucydides
Thucydides. History of the Peloponnesian War. Crawley, Richard, translator. London and Toronto: J. M. Dent and Sons Ltd.; New York: E. P. Dutton and Co., 1914.
The Plataeans, seeing their enemies in a trap, now consulted whether they should set fire to the building and burn them just as they were, or whether there was anything else that they could do with them;
until at length these and the rest of the Theban survivors found wandering about the town agreed to an unconditional surrender of themselves and their arms to the Plataeans.
While such was the fate of the party in Plataea,
the rest of the Thebans who were to have joined them with all their forces before daybreak, in case of anything miscarrying with the body that had entered, received the news of the affair on the road, and pressed forward to their succor.
Now Plataea is nearly eight miles from Thebes, and their march was delayed by the rain that had fallen in the night, for the river Asopus had risen and was not easy of passage;