CAB(i)
21 In the law it is written: "With men of other tongues and by strange lips I will speak to this people; and yet not even in this way will they hear Me," says the Lord.
22 So then tongues are for a sign, not to those who believe but to unbelievers; but prophesying is not for unbelievers but for those who believe.
23 If then the whole church comes together at the same place, and all speak in tongues, and there come in those that are unlearned or unbelievers, will they not say that you are mad?