Plutarch, Alcibiades
Bernadotte Perrin, Ed.

Moreover, this splendor of his at Olympia was made even more conspicuous by the emulous rivalry of the cities in his behalf. The Ephesians equipped him with a tent of magnificent adornment; the Chians furnished him with provender for his horses and with innumerable animals for sacrifice; the Lesbians with wine and other provisions for his unstinted entertainment of the multitude. However, a grave calumny—or malpractice on his part—connected with this rivalry was even more in the mouths of men. [2]

It is said, namely, that there was at Athens one Diomedes, a reputable man, a friend of Alcibiades, and eagerly desirous of winning a victory at Olympia. He learned that there was a racing-chariot at Argos which was the property of that city, and knowing that Alcibiades had many friends and was very influential there, got him to buy the chariot. [3] Alcibiades bought it for his friend, and then entered it in the racing lists as his own, bidding Diomedes go hang. Diomedes was full of indignation, and called on gods and men to witness his wrongs. It appears also that a law-suit arose over this matter, and a speech was written by Isocrates¹ for the son of Alcibiades ‘Concerning the Team of Horses.’ In this speech, however it is Tisias, not Diomedes, who is the plaintiff.