History of the Peloponnesian War

For they invade not these divided races upon hatred of a side, but upon a covetous desire of those necessaries which we enjoy in common. And this they have proved themselves in their coming hither to aid the Chalcideans.

For though they never received any aid by virtue of their league from the Chalcideans, yet have they on their part been more forward to help them than by the league they were bound unto.