1 Corinthians 9:11-14

If we have sown spiritual things among you, is it too much if we reap material things from you? If others share this rightful claim on you, do not we even more? Nevertheless, we have not made use of this right, but we endure anything rather than put an obstacle in the way of the gospel of Christ. Do you not know that those who are employed in the temple service get their food from the temple, and those who serve at the altar share in the sacrificial offerings? In the same way, the Lord commanded that those who proclaim the gospel should get their living by the gospel.