1 Corinthians 9:10-11

10No, God wanted to help us too. That is why he gave this rule to Moses for his people. Any farmer who works hard to grow food should get some of the food for himself. He ploughs his fields and he prepares the seeds because he hopes to eat some of the food.

11Our spiritual work among you is like we have planted seeds. In return, you should give to us the food and clothes that we need to live. That is like the harvest that we should receive from our work.