1st Corinthians 9:17

14 Even so hath the Lord ordained that they which preach the gospel should live of the gospel.

15 But I have used none of these things: neither have I written these things, that it should be so done unto me: for it were better for me to die, than that any man should make my glorying void.

16 For though I preach the gospel, I have nothing to glory of: for necessity is laid upon me; yea, woe is unto me, if I preach not the gospel!

17 For if I do this thing willingly, I have a reward: but if against my will, a dispensation of the gospel is committed unto me.

18 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.

19 For though I be free from all men, yet have I made myself servant unto all, that I might gain the more.

20 And unto the Jews I became as a Jew, that I might gain the Jews; to them that are under the law, as under the law, that I might gain them that are under the law;