1 Corinthians 14:2-4

14:2 For the one speaking in a tongue does not speak to people but to God, for no one understands; he is speaking mysteries by the Spirit. 14:3 But the one who prophesies speaks to people for their strengthening, encouragement, and consolation. 14:4 The one who speaks in a tongue builds himself up, but the one who prophesies builds up the church.