1st Corinthians 14:21

18 I give praise to God that I am able to make use of tongues more than you all:

19 But in the church it would be better for me to make use of five words of which the sense was clear, so that others might have profit, than ten thousand words in a strange tongue.

20 My brothers, do not be children in mind: in evil be as little children, but in mind be of full growth.

21 In the law it is said, By men of other tongues and by strange lips will my words come to this people; and not even so will they give ear to me, says the Lord.

22 For this reason tongues are for a sign, not to those who have faith, but to those who have not: but the prophet's word is for those who have faith, and not for the rest who have not.

23 If, then, the church has come together, and all are using tongues, and there come in men without knowledge or faith, will they not say that you are unbalanced?

24 But if all are teaching as prophets, and a man without faith or knowledge comes in, he is tested by all, he is judged by all;