1 Corinthians 9:18 in the King James Version
What is my reward then? Verily that, when I preach the gospel, I may make the gospel of Christ without charge, that I abuse not my power in the gospel.
Context
17 For if I do this of my own will, I have a reward. But if not of my own will, I have a stewardship entrusted to me.
18 What then is my reward? That when I preach the Good News, I may present the Good News of Christ without charge, so as not to abuse my authority in the Good News.
19 For though I was free from all, I brought myself under bondage to all, that I might gain the more.