History of the Peloponnesian War

And this was the greatest army that ever the Athenians had together in one place before, the city being now in her strength and the plague not yet amongst them. For the Athenians themselves were no less than ten thousand men of arms, besides the three thousand at Potidaea; and the strangers that dwelt amongst them and accompanied them in this invasion were no fewer than three thousand men of arms more, besides other great numbers of lightarmed soldiers.