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 the Argives, coming to Athens, made complaint that, although it was written in the treaty that they were not to allow enemies to go through their respective territories,[*](cf. 5.47.5.) the Athenians had permitted the Lacedaemonians to go past their territory[*](ie. past Aegina, now Athenian territory.) by sea; unless, then, the Athenians should bring the Messenians and Helots to Pylos to annoy the Lacedaemonians, they themselves would feel aggrieved.
So the Athenians, on the advice of Alcibiades, inscribed at the bottom of the Laconian column that the Lacedaemonians had not kept their oaths, and they brought to Pylos the Helots from Cranii,[*](cf. 5.35.7.) to plunder the country;