1 Corinthians 9
25 Ref And every man who takes part in the sports has self-control in all things. Now they do it to get a crown which is of this world, but we for an eternal crown.
26 Ref So then I am running, not uncertainly; so I am fighting, not as one who gives blows in the air:
27 Ref But I give blows to my body, and keep it under control, for fear that, after having given the good news to others, I myself might not have God's approval.