'Revelation' in the Bible

But, brethren, as things are, if I come to you speaking in 'tongues,' what benefit shall I confer on you, if the utterance is neither in the form of a revelation nor of additional knowledge nor of prophecy nor of teaching?

What then, brethren? Whenever you assemble, there is not one of you who is not ready either with a song of praise, a sermon, a revelation, a 'tongue,' or an interpretation. Let everything be done with a view to the building up of faith and character.