History of the Peloponnesian War

Now when Cylon was consulting the oracle at Delphi, the god told him to seize on the Acropolis of the Athenians during the greatest feast of Jupiter.

So having received a force from Theagenes, and persuaded his friends to it, when the Olympic festival in the Peloponnese came on, he seized the Acropolis with a view to establishing a tyranny;

thinking that that was the greatest festival of Jupiter, and that it was a very proper time for him, as he had conquered at the Olympic games. But whether it was the greatest festival in Attica, or elsewhere, that had been alluded to, lie neither stopped to consider, nor did the oracle express. For the Athenians also have a Diasian festival, which is called the greatest festival of Jupiter Milichius, held outside the city, in which all the people offer [something, though] many of them not victims, but country-offerings. [*]( i. e. little figures of dough or paste made into the shape of the swine, or other animals, which they were too poor to offer.)