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.
The god answered them, as it is said, that if they warred with all their might, victory would be theirs, and said that he himself would help them, whether invoked or uninvoked.
But they wished to summon their allies again and put[*](432 B.C.) to them the question whether they should go to war. And when the envoys from the allies had come and an assembly was held, the others said what they wished, most of them complaining of the Athenians and demanding that the war should be entered upon, and especially the Corinthians. They had already, before the meeting, privately begged the allies city by city to vote for the war, fearing lest Potidaea would be destroyed before help came, and now, being also present at this meeting, they came forward last of all and spoke as follows:
" Men of the allies, we can no longer complain of the Lacedaemonians that they have not both themselves voted for the war and also brought us together for this object. And that is right; for it is the duty of leaders, while equitably considering their particular interests, to have special regard for the general weal, just as in other matters they are honoured above all.