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 there were at first three thousand of these, and the number was not less than this throughout the siege, besides sixteen hundred who came with Phormio, but went away before the siege was over; and the sailors on the ships all drew the same pay as the soldiers. It was in this way, then, that their money was exhausted at first, and this was the largest number of ships manned by them.
While the Lacedaemonians were at the Isthmus, the Mytilenaeans and their auxiliaries[*](Foreign mercenaries; cf. 3.2.2.) marched with their army against Methymna, which they supposed was being betrayed into their hands; and they assaulted the city, but when their attempt did not succeed as they had expected, they went off to Antissa, Pyrrha and Eresus, and after establishing their interests in these cities on a firmer basis and strengthening the walls, went home in haste.