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.
At Thuria they found that the faction opposed to the Athenians had recently been expelled in a revolution;
and as they were desirous, after collecting their whole armament at that place, to hold a review of it, on the chance that anyone had been left behind, and also to persuade the Thurians both to take part with them in the expedition with all zeal and, in view of the Athenians' present good fortune, to regard the same persons foes and friends as the Athenians did, they waited at Thuria and dealt with these matters.