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.

This they continued to pay till the Attic war broke out; when, on their ceasing to do so on the pretext of the war, the Eleans proceeded to compel them; on which they had recourse to the Lacedaemonians. When the case was thus submitted to the arbitration of the Lacedaemonians, the Eleans, suspecting that they should not have justice, renounced the reference, and laid waste the Leprean territory.