1 Corinthians 9:26 in the King James Version
I therefore so run, not as uncertainly; so fight I, not as one that beateth the air:
Context
25 Every man who strives in the games exercises self-control in all things. Now they do it to receive a corruptible crown, but we an incorruptible.
26 I therefore run like that, not aimlessly. I fight like that, not beating the air,
27 but I beat my body and bring it into submission, lest by any means, after I have preached to others, I myself should be disqualified.