Parallel
2 Timothy 2:5
Patriarchal Greek New Testament (1904) · Berean Standard Bible
ἐὰν δὲ καὶ ἀθλῇ τις, οὐ στεφανοῦται, ἐὰν μὴ νομίμως ἀθλήσῃ.
Likewise, a competitor does not receive the crown unless he competes according to the rules.