1 Corinthians 9:16-17

For you see, even though I proclaim the good news, I can’t take the credit for my labors, for I am compelled to fulfill my duty by completing this work. It would be agony to me if I did not constantly preach the gospel! If it were my own idea to preach as a way to make a living, I would expect to be paid. Since it’s not my idea but God’s, who commissioned me, I am entrusted with the stewardship of the gospel whether or not I’m paid.