1 Corinthians 1:17

1:17 For Christ did not send me to baptize, but to preach the gospel – and not with clever speech, so that the cross of Christ would not become useless.

1 Corinthians 9:18

9:18 What then is my reward? That when I preach the gospel I may offer the gospel free of charge, and so not make full use of my rights in the gospel.

1 Corinthians 15:1

Christ’s Resurrection

15:1 Now I want to make clear for you, brothers and sisters, the gospel that I preached to you, that you received and on which you stand,