He who speaks in a tongue edifies himself, but he who prophesies edifies the church.
1 Corinthians 14:4
Surrounding context
14:3 But he who prophesies speaks edification and exhortation and comfort to men.
14:4 He who speaks in a tongue edifies himself, but he who prophesies edifies the church.
14:5 I wish you all spoke with tongues, but even more that you prophesied; for he who prophesies is greater than he who speaks with tongues, unless indeed he interprets, that the church may receive edification.