1 Corinthians 14:2-4

New Catholic Bible

² If anyone speaks in tongues, he is speaking not to men but to God, and no one understands him, for he is speaking mysteries in the Spirit. ³ On the other hand, the one who prophesies speaks to men for their building up, their encouragement, and their consolation.

⁴ Whoever speaks in a tongue builds himself up, but whoever prophesies builds up the Church.