1 Corinthians 9:18-20

New Revised Standard Version Catholic Edition

¹⁸ What then is my reward? Just this: that in my proclamation I may make the gospel free of charge, so as not to make full use of my rights in the gospel.

¹⁹ For though I am free with respect to all, I have made myself a slave to all, so that I might win more of them. ²⁰ To the Jews I became as a Jew, in order to win Jews. To those under the law I became as one under the law (though I myself am not under the law) so that I might win those under the law.