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.
For some seventy days they thus lived all together, after which all, except the Athenians and any Siceliots or Italiots who had joined in the expedition, were sold.
The total number of prisoners taken it would be difficult to state exactly, but it could not have been less than seven thousand.
This was the greatest Hellenic achievement of any in this war, or, in my opinion, in Hellenic history; at once most glorious to the victors, and most calamitous to the conquered.
They were beaten at all points and altogether; all that they suffered was great; they were destroyed, as the saying is, with a total destruction, their fleet, their army—everything was destroyed, and few out of many returned home. Such were the events in Sicily.
Such were the events in Sicily. When the news was brought to Athens, for a long while they disbelieved even the most respectable of the soldiers who had themselves escaped from the scene of action and clearly reported the matter, a destruction so complete not being thought credible. When the conviction was forced upon them, they were angry with the orators who had joined in promoting the expedition, just as if they had not themselves voted it, and were enraged also with the reciters of oracles and soothsayers, and all other omenmongers of the time who had encouraged them to hope that they should conquer Sicily.