1 Corinthians 9:27 YLT

²⁵  and every one who is striving, is in all things temperate; these, indeed, then, that a corruptible crown they may receive, but we an incorruptible;

²⁶  I, therefore, thus run, not as uncertainly, thus I fight, as not beating air;

²⁷  but I chastise my body, and bring 'it' into servitude, lest by any means, having preached to others -- I myself may become disapproved.