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.
In the course of this war, however, you have neither suffered, nor were ever in danger of suffering, any extraordinary harm at our hands.
And if we refused to revolt from the Athenians at your bidding, we were not in the wrong; for they helped us against the Thebans when you held back. After that it would not have been honourable for us to desert them, above all when we were their debtors and when at our own request we had been admitted to their alliance and had shared the rights of citizenship with them. On the contrary, there was every reason why we should heartily obey their commands.
And whatever measures either you or they have initiated for your allies, it is not the followers who are to blame for any wrong that has been done, but those who have led them into evil courses.
"As for the Thebans, they have done us many wrongs in the past, and you yourselves are well aware of this crowning outrage, which has brought us into our present plight.
They attempted to seize our city in time of peace, and furthermore on a day of festival; therefore we were justified in punishing them in accordance with the law which has universal sanction, that it is right to repel him who comes against you as an enemy;