History of the Peloponnesian War

The same summer fell out a war between the Epidaurians and the Argives; the pretext thereof was about a beast for sacrifice, which the Epidaurians ought to have sent in consideration of their pastures to Apollo Pythius, and had not done it, the Argives being the principal owners of the temple. But Alcibiades and the Argives had indeed determined to take in the city, though without pretence at all, both that the Corinthians might not stir and also that they might bring the Athenian succours from Aegina into those parts, a nearer way than by compassing the promontory of Scyllaeum. And therefore the Argives prepared, as of themselves, to exact the sacrifice by invasion.