1 Corinthians 9:19 ASV

¹⁷  For if I do this of mine own will, I have a reward: but if not of mine own will, I have a stewardship intrusted to me.

¹⁸  What then is my reward? That, when I preach the gospel, I may make the gospel without charge, so as not to use to the full my right in the gospel.

¹⁹  For though I was free from all 'men,' I brought myself under bondage to all, that I might gain the more.

²⁰  And to the Jews I became as a Jew, that I might gain Jews; to them that are under the law, as under the law, not being myself under the law, that I might gain them that are under the law;

²¹  to them that are without law, as without law, not being without law to God, but under law to Christ, that I might gain them that are without law.