Mark 16:17:
And these signs shall follow them that believe; In my name shall they cast out devils; they shall speak with new tongues.
Acts 2:1-4:
And when the day of Pentecost was fully come, they were all with one accord in one place.
And suddenly there came a sound from heaven as of a rushing mighty wind, and it filled all the house where they were sitting.
And there appeared unto them cloven tongues like as of fire, and it sat upon each of them.
And they were all filled with the Holy Ghost [the gift of holy spirit], and began to speak with other tongues, as the Spirit [God, the Giver] gave them utterance.
Acts 2:6-8,11:
Now when this was noised abroad, the multitude came together, and were confounded, because that every man heard them speak in his own language.
And they were all amazed and marvelled, saying one to another, Behold, are not all these which speak Galilaeans?
And how hear we every man in our own tongue, wherein we were born?
…we do hear them speak in our tongues the wonderful works of God.
Acts 10:44-46:
While Peter yet spake these words, the Holy Ghost [the gift of holy spirit] fell on all them which heard the word.
And they of the circumcision which believed were astonished, as many as came with Peter, because that on the Gentiles also was poured out the gift of the Holy Ghost [the gift of holy spirit].
For they heard them speak with tongues, and magnify God….
Acts 19:1-6:
And it came to pass, that, while Apollos was at Corinth, Paul having passed through the upper coasts came to Ephesus: and finding certain disciples,
He said unto them, Have ye received the Holy Ghost [the gift of holy spirit in manifestation] since ye believed? And they said unto him, We have not so much as heard whether there be any Holy Ghost [the gift of holy spirit in manifestation].
And he said unto them, Unto what then were ye baptized? And they said, Unto John’s baptism.
Then said Paul, John verily baptized with the baptism of repentance, saying unto the people, that they should believe on him which should come after him, that is, on Christ Jesus.
When they heard this, they were baptized in the name of the Lord Jesus.
And when Paul had laid his hands upon them, the Holy Ghost [the gift of holy spirit in manifestation] came on them; and they spake with tongues, and prophesied.
I Corinthians 12:7,10:
But the manifestation of the Spirit is given to every man to profit withal.
To another the working of miracles; to another prophecy; to another discerning of spirits; to another divers kinds of tongues; to another the interpretation of tongues.
I Corinthians 12:28:
And God hath set some in the church, first apostles, secondarily prophets, thirdly teachers, after that miracles, then gifts of healings, helps, governments, diversities of tongues.
I Corinthians 13:1:
Though I speak with the tongues of men and of angels, and have not charity, I am become as sounding brass, or a tinkling cymbal.
I Corinthians 13:8-10:
Charity never faileth: but whether there be prophecies, they shall fail; whether there be tongues, they shall cease; whether there be knowledge, it shall vanish away.
For we know in part, and we prophesy in part.
But when that which is perfect is come, then that which is in part shall be done away.
I Corinthians 14:2:
For he that speaketh in an unknown tongue speaketh not unto men, but unto God: for no man understandeth him; howbeit in the spirit he speaketh mysteries.
I Corinthians 14:4-6:
He that speaketh in an unknown tongue edifieth himself; but he that prophesieth edifieth the church.
I would that ye all spake with tongues, but rather that ye prophesied [in public worship]: for greater is he that prophesieth than he that speaketh with tongues, except he interpret, that the church may receive edifying.
Now, brethren, if I come unto you speaking with tongues, what shall I profit you, except I shall speak to you either by revelation, or by knowledge, or by prophesying, or by doctrine?
I Corinthians 14:13-19:
Wherefore let him that speaketh in an unknown tongue pray [believe] that he may interpret.
For if I pray in an unknown tongue, my spirit prayeth, 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.
Else when thou shalt bless with the spirit, how shall he that occupieth the room of the unlearned say Amen at thy giving of thanks, seeing he understandeth not what thou sayest?
For thou verily givest thanks well, but the other is not edified.
I thank my God, I speak with tongues more than ye all:
Yet in the church I had rather speak five words with my understanding, that by my voice I might teach others also, than ten thousand words in an unknown tongue.
I Corinthians 14:22-25:
Wherefore tongues are for a sign, not to them that believe, but to them that believe not: but prophesying serveth not for them that believe not, but for them which believe.
If therefore the whole church be come together into one place, and all speak with tongues, and there come in those that are unlearned, or unbelievers, will they not say that ye are mad?
But if all prophesy, and there come in one that believeth not, or one unlearned, he is convinced of all, he is judged of all:
And thus are the secrets of his heart made manifest; and so falling down on his face he will worship God, and report that God is in you of a truth.
I Corinthians 14:27,28:
If any man speak in an unknown tongue, let it be by two, or at the most by three, and that by course; and let one interpret.
But if there be no interpreter, let him keep silence in the church; and let him speak to himself, and to God.
I Corinthians 14:39:
Wherefore, brethren, covet to prophesy, and forbid not to speak with tongues.