I Corinthians 9:10-13

Or does He say it altogether for our sakes? For our sakes, no doubt, this is written, that he who plows should plow in hope, and he who threshes in hope should be partaker of his hope. If we have sown spiritual things for you, is it a great thing if we reap your material things? 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. Do you not know that those who minister the holy things eat of the things of the temple, and those who serve at the altar partake of the offerings of the altar?