History of the Peloponnesian War
Thucydides
Thucydides. The history of the Peloponnesian War, Volume 1-2. Dale, Henry, translator. London: Heinemann and Henry G. Bohn, 1851-1852.
but why they did not come on, is a subject of many conjectures. For some think it was, that by going away he might, in accordance with his plan, wear down the power of the Peloponnesians; (at any rate Tamos, who was intrusted with the charge, provided them with supplies no better, but even worse, than himself.) Others, that after bringing the Phoenicians to Aspendus, he might exact money from them for their discharge; (for under no circumstances did he intend to employ them on any service.) Others, that it was on account of the clamour against him, which had spread to Lacedaemon—to have it said that he was not wronging them, but was certainly gone for the ships, which were undoubtedly manned for service.