History of the Peloponnesian War

Immediately after, there came also an embassy from the Eleans, who concluded an alliance with the Corinthians in the first place, and then proceeded thence to Argos, as they had been previously instructed, and became allies of the Argives. For they were at variance with the Lacedaemonians just then about Lepreum.

For a war having before this arisen between the Lepreans and some of the Arcadians, and the Eleans having been invited to alliance by the Lepreans, on condition of receiving half their territory, and having brought the war to a conclusion, the Eleans imposed on the Lepreans, who were themselves allowed to occupy the territory, the payment of a talent to the Olympian Jupiter.