1 Corinthians 14:2-4

Haweis(i) 2 For he that speaketh in an unknown tongue, speaketh not to men, but to God: for no man understandeth him; although in spirit he speaketh mysterious truths. 3 But he that prophesieth, addresseth men for edification, and exhortation, and consolation. 4 He that speaketh in an unknown tongue, edifieth himself; but he that prophesieth, edifieth the church.