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.
Again, they say that when the barbarians came against Hellas they were the only Boeotians who did not medize, and for this especially they plume themselves and abuse us.