1 Corinthians 1:17; 1 Corinthians 9:16; 1 Corinthians 9:18; 1 Corinthians 15:1-2
For Christ sent me not to baptize , but to preach the gospel : not with wisdom of words, lest the cross of Christ should be made of none effect .
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 !
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.
Moreover, brethren, I declare unto you the gospel which I preached unto you, which also ye have received , and wherein ye stand ;
By which also ye are saved , if ye keep in memory what I preached unto you, unless ye have believed in vain.