I Corinthians 9:12, 14, 18, 23

If others are partakers of this right over you, are we not even more? Nevertheless we have not used this right, but endure all things lest we hinder the gospel of Christ.

Even so the Lord has commanded that those who preach the gospel should live from the gospel.

What is my reward then? That when I preach the gospel, I may present the gospel of Christ without charge, that I may not abuse my authority in the gospel.

Now this I do for the gospel’s sake, that I may be partaker of it with you.