1 Corinthians 9:18-20

Young's Literal Translation

¹⁸ What, then, is my reward? -- that proclaiming good news, without charge I shall make the good news of the Christ, not to abuse my authority in the good news;

¹⁹ for being free from all men, to all men I made myself servant, that the more I might gain;

²⁰ and I became to the Jews as a Jew, that Jews I might gain; to those under law as under law, that those under law I might gain;