1 Corinthians 9:27 WBT

²⁵  And every man that striveth for the mastery is temperate in all things. Now they [do it] to obtain a corruptible crown; but we an incorruptible.

²⁶  I therefore so run, not as uncertainly; so I fight, not as one that beateth the air:

²⁷  But I keep under my body, and bring [it] into subjection: lest by any means when I have preached to others, I myself should be a cast-away.