6 Bible Verses about Speaking In Tongues

It happened that, while Apollos was at Corinth, Paul, having passed through the upper country, came to Ephesus, and found certain disciples. He said to them, "Did you receive the Holy Spirit when you believed?" They said to him, "No, we haven't even heard that there is a Holy Spirit." He said, "Into what then were you baptized?" They said, "Into John's baptism."read more.
Paul said, "John indeed baptized with the baptism of repentance, saying to the people that they should believe in the one who would come after him, that is, in Jesus." When they heard this, they were baptized in the name of the Lord Jesus. When Paul had laid his hands on them, the Holy Spirit came on them, and they spoke with other languages and prophesied. They were about twelve men in all.

to another faith, by the same Spirit; and to another gifts of healings, by the same Spirit; and to another workings of miracles; and to another prophecy; and to another discerning of spirits; to another different kinds of languages; and to another the interpretation of languages.

Now you are the body of Christ, and members individually. God has set some in the assembly: first apostles, second prophets, third teachers, then miracle workers, then gifts of healings, helps, governments, and various kinds of languages. Are all apostles? Are all prophets? Are all teachers? Are all miracle workers?read more.
Do all have gifts of healings? Do all speak with various languages? Do all interpret? But earnestly desire the best gifts. Moreover, I show a most excellent way to you.

Love never fails. But where there are prophecies, they will be done away with. Where there are various languages, they will cease. Where there is knowledge, it will be done away with.

For he who speaks in another language speaks not to men, but to God; for no one understands; but in the Spirit he speaks mysteries. But he who prophesies speaks to men for their edification, exhortation, and consolation. He who speaks in another language edifies himself, but he who prophesies edifies the assembly.read more.
Now I desire to have you all speak with other languages, but rather that you would prophesy. For he is greater who prophesies than he who speaks with other languages, unless he interprets, that the assembly may be built up. But now, brothers, if I come to you speaking with other languages, what would I profit you, unless I speak to you either by way of revelation, or of knowledge, or of prophesying, or of teaching? Even things without life, giving a voice, whether pipe or harp, if they didn't give a distinction in the sounds, how would it be known what is piped or harped? For if the trumpet gave an uncertain sound, who would prepare himself for war? So also you, unless you uttered by the tongue words easy to understand, how would it be known what is spoken? For you would be speaking into the air. There are, it may be, so many kinds of sounds in the world, and none of them is without meaning. If then I don't know the meaning of the sound, I would be to him who speaks a foreigner, and he who speaks would be a foreigner to me. So also you, since you are zealous for spiritual gifts, seek that you may abound to the building up of the assembly. Therefore let him who speaks in another language pray that he may interpret. For if I pray in another language, my spirit prays, but my understanding is unfruitful. What is it then? I will pray with the spirit, and I will pray with the understanding also. I will sing with the spirit, and I will sing with the understanding also. Otherwise if you bless with the spirit, how will he who fills the place of the unlearned say the "Amen" at your giving of thanks, seeing he doesn't know what you say? For you most certainly give thanks well, but the other person is not built up. I thank my God, I speak with other languages more than you all. However in the assembly I would rather speak five words with my understanding, that I might instruct others also, than ten thousand words in another language. Brothers, don't be children in thoughts, yet in malice be babies, but in thoughts be mature. In the law it is written, "By men of strange languages and by the lips of strangers I will speak to this people. Not even thus will they hear me, says the Lord." Therefore other languages are for a sign, not to those who believe, but to the unbelieving; but prophesying is for a sign, not to the unbelieving, but to those who believe. If therefore the whole assembly is assembled together and all speak with other languages, and unlearned or unbelieving people come in, won't they say that you are crazy? But if all prophesy, and someone unbelieving or unlearned comes in, he is reproved by all, and he is judged by all. And thus the secrets of his heart are revealed. So he will fall down on his face and worship God, declaring that God is among you indeed. What is it then, brothers? When you come together, each one of you has a psalm, has a teaching, has a revelation, has another language, has an interpretation. Let all things be done to build each other up. If any man speaks in another language, let it be two, or at the most three, and in turn; and let one interpret. But if there is no interpreter, let him keep silent in the assembly, and let him speak to himself, and to God.

Therefore, brothers, desire earnestly to prophesy, and don't forbid speaking with other languages. Let all things be done decently and in order.