I Corinthians 9:25, 27
I Corinthians 9:25 NKJV
And everyone who competes for the prize is temperate in all things. Now they do it to obtain a perishable crown, but we for an imperishable crown.
I Corinthians 9:27 NKJV
But I discipline my body and bring it into subjection, lest, when I have preached to others, I myself should become disqualified.