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.
and shall not, if we are wise, overlook our allies' being injured, nor delay to assist them; for there is no longer delay in their being ill-treated. Others have in abundance riches, and ships, and horses;
but we have good allies, whom we must not give up to the Athenians, nor decide the question with suits and words, while it is not also in word that we are injured; but we must assist them with speed and with all our might. And let no one tell me that it is proper for us to deliberate who are being wronged.
It is for those who are about to commit the wrong that it is much more proper to deliberate for a long time.
Vote then, Lacedaemonians, for war, as is worthy of Sparta; and neither permit the Athenians to become greater, nor let us betray our allies; but with the help of the gods let us proceed against those who are wronging them.