1 Corinthians 14:2-4

For if you have the ability to speak in tongues, you will be talking only to God, since people won’t be able to understand you. You will be speaking by the power of the Spirit, but it will all be mysterious. But one who prophesies strengthens others, encourages them, and comforts them. A person who speaks in tongues is strengthened personally, but one who speaks a word of prophecy strengthens the entire church.