History of the Peloponnesian War
Thucydides
Thucydides, Vol. 1-4. Smith, Charles Foster, translator. London and Cambridge, MA: Heinemann and Harvard University Press, 1919-1923.
And when the horseman had gone and brought back word that they had indeed surrendered, Nicias announced by herald to Gylippus and the Syracusans that he was ready to agree, on behalf of the Athenians, to repay to the Syracusans all the money which they had spent upon the war, on condition that they should let his army go; and until the money should be paid, he would give Athenians as hostages, one man for each talent.
Gylippus and the Syracusans, however, would not accept these terms, but renewing the attack and surrounding the Athenian army plied these men also with their missiles until evening.
And they were in a wretched plight through want of food and of all necessaries. Nevertheless they waited for the quiet time of night and intended then to proceed. But no sooner had they taken up their arms than the Syracusans perceived it and raised the paean.
So the Athenians, seeing that their movements were detected, again put down their arms—all except about three hundred men, who forced their way through the guards and proceeded during the night by whatever way they could.
When day came[*](Eighth day of the retreat.) Nicias led his army forward; but the Syracusans and their allies kept attacking in the same fashion, hurling missiles and striking them down with javelins on all sides.
The Athenians pushed on to the river Assinarus,[*](The modern Falconara, called also Fiume di Noto.) partly because they thought, hard pressed as they were on all sides by the attack of numerous horsemen and of the miscellaneous troops, that they would be somewhat better off if they crossed the river, and partly by reason of their weariness and desire for water.