1st Corinthians 14:24

21 in the law it hath been written, that, `With other tongues and with other lips I will speak to this people, and not even so will they hear Me, saith the Lord;`

22 so that the tongues are for a sign, not to the believing, but to the unbelieving; and the prophesy [is] not for the unbelieving, but for the believing,

23 If, therefore, the whole assembly may come together, to the same place, and all may speak with tongues, and there may come in unlearned or unbelievers, will they not say that ye are mad?

24 and if all may prophecy, and any one may come in, an unbeliever or unlearned, he is convicted by all, he is discerned by all,

25 and so the secrets of his heart become manifest, and so having fallen upon [his] face, he will bow before God, declaring that God really is among you.

26 What then is it, brethren? whenever ye may come together, each of you hath a psalm, hath a teaching, hath a tongue, hath a revelation, hath an interpretation? let all things be for building up;

27 if an [unknown] tongue any one do speak, by two, or at the most, by three, and in turn, and let one interpret;