1Cor 14:4, 21-22 | ESV | STEP | The one who speaks in a tongue builds up himself , but the one who prophesies builds up the church .

bCited from Isa. 28:11, 12; [Deut. 28:49]

1 Corinthians 14:4

4 The one who speaks in a tongue builds up himself, but the one who prophesies builds up the church.

1 Corinthians 14:21-22

21 ^aIn the Law it is written, ^b“By people of strange tongues and by the lips of foreigners will I speak to this people, and even then they will not listen to me, says the Lord.” 22 Thus tongues are a sign not for believers but for unbelievers, while prophecy is a sign ^{▼▼Greek lacks a sign} not for unbelievers but for believers.