Against Alcibiades 1 (36-37)

For if during his exile it was his power that enabled him to injure the city, how was it that, having obtained his return by deceiving you and being in command of many ships of war, he had not power enough to expel the enemy from our land or to regain for you the friendship of the Chians whom he had alienated, or to do you any other useful service?

Thus there is no difficulty in concluding that on the score of power he had no particular advantage, but that in foul play he stood first of his fellows. For he took upon him to indicate to the Lacedaemonians the points in your affairs which he knew to be in a bad way; but, when he had the duty of holding the command, he was powerless to do them any harm. After undertaking that, for his sake, the king would provide us with money, he embezzled more than two hundred talents of our city’s funds.