1 Corinthians 9:19 in the King James Version
For though I be free from all men, yet have I made myself servant unto all, that I might gain the more.
Context
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.
20 To the Jews I became as a Jew, that I might gain Jews; to those who are under the law, as under the law, that I might gain those who are under the law;