2 Timothy 2:5
And if a man also strive for masteries, yet is he not crowned, except he strive lawfully.
The following were among the regulations of the athletic contests. Every candidate was required to be of pure Hellenic descent. He was disqualified by certain moral and political offences. He was obliged to take an oath that he had been ten months in training, and that he would violate none of the regulations. Bribery was punished by a fine. The candidate was obliged to practise again in the gymnasium immediately before the games, under the direction of judges or umpires, who were themselves required to be instructed for ten months in the details of the games.
(Conybeare and Howson.)
Parallel VersesKJV: And if a man also strive for masteries, yet is he not crowned, except he strive lawfully.