Matthew 25:25

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.

They called them, and commanded them not to speak at all nor teach in the name of Jesus. But Peter and John answered and said unto them, . . . We cannot but speak the things which we have seen and heard.