It is the glory of God to conceal a thing: but the glory honour of kings is to search out a matter.
https://www.biblegateway.com/passage/?search=Prov.25.2&version=KJV
The scripture sets precedence for those who believe. Let’s also remember that this is for the unbelievers to look into.
Let’s look at the origin of this with Zecharias:
The angel replied and said to him, “I am Gabriel; I stand and minister in the [very] presence of God, and I have been sent [by Him] to speak to you and to bring you this good news. Listen carefully, you will be continually silent and unable to speak until the day when these things take place, because you did not believe what I told you; but my words will be fulfilled at their proper time.” But when he did come out, he was unable to speak to them.
They realized that he had seen a vision in the temple; and he kept making signs to them, and remained mute. It happened that on the eighth day they came to circumcise the child [as required by the Law], and they intended to name him Zacharias, after his father; but his mother answered, “No indeed; instead he will be called John.”
And he asked for a writing tablet and wrote as follows, “His name is John.” And they were all astonished. At once Zacharias’ mouth was opened and his tongue freed, and he began speaking, praising and blessing and thanking God. Then fear came on all their neighbors; and all these things were discussed throughout the hill country of Judea.
https://www.biblegateway.com/passage/?search=Luke.1.19,Luke.1.20,Luke.1.22,Luke.1.59,Luke.1.60,Luke.1.63,Luke.1.64,Luke.1.65&version=AMP
Proverbs 15:4
A wholesome tongue is a tree of life:
but perverseness therein is a breach in the spirit.”
Let’s look at traditional teaching: specifically Blasphemies.
Ye hypocrites, well did Esaias prophesy of you, saying, This people draweth nigh unto me with their mouth, and honoureth me with their lips; but their heart is far from me. But in vain they do worship me, teaching for doctrines the commandments of men. And he called the multitude, and said unto them, Hear, and understand: Not that which goeth into the mouth defileth a man; but that which cometh out of the mouth, this defileth a man. Then came his disciples, and said unto him, Knowest thou that the Pharisees were offended, after they heard this saying? But he answered and said, Every plant, which my heavenly Father hath not planted, shall be rooted up. Let them alone: they be blind leaders of the blind. And if the blind lead the blind, both shall fall into the ditch. But those things which proceed out of the mouth come forth from the heart; and they defile the man. For out of the heart proceed evil thoughts, murders, adulteries, fornications, thefts, false witness, blasphemies: These are the things which defile a man: but to eat with unwashen hands defileth not a man.
https://www.biblegateway.com/passage/?search=Matt.15.7,Matt.15.8,Matt.15.9,Matt.15.10,Matt.15.11,Matt.15.12,Matt.15.13,Matt.15.14,Matt.15.18,Matt.15.19,Matt.15.20&version=KJV
Love never fails [it never fades nor ends]. But as for prophecies, they will pass away; as for tongues, they will cease; as for the gift of special knowledge, it will pass away. For we know in part, and we prophesy in part [for our knowledge is fragmentary and incomplete]. But when that which is complete and perfect comes, that which is incomplete and partial will pass away.
https://www.biblegateway.com/passage/?search=1Cor.13.8,1Cor.13.9,1Cor.13.10&version=AMP
The Apostle Paul gives us this mysterious reference regarding tongue as well.
I knew a man in Christ above fourteen years ago, (whether in the body, I cannot tell; or whether out of the body, I cannot tell: God knoweth;) such an one caught up to the third heaven. How that he was caught up into paradise, and heard unspeakable words, which it is not lawful for a man to utter. Of such an one will I glory: yet of myself I will not glory, but in mine infirmities.
https://www.biblegateway.com/passage/?search=2Cor.12.2,2Cor.12.4,2Cor.12.5&version=KJV
Follow after charity, and desire spiritual gifts, but rather that ye may prophesy. 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. 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: 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? So likewise ye, except ye utter by the tongue words easy to be understood, how shall it be known what is spoken? for ye shall speak into the air. Even so ye, forasmuch as ye are zealous of spiritual gifts, seek that ye may excel to the edifying of the church. Wherefore let him that speaketh in an unknown tongue pray that he may interpret. For if I pray in an unknown tongue, my spirit prayeth, but my understanding is unfruitful.
https://www.biblegateway.com/passage/?search=1Cor.14.1,1Cor.14.2,1Cor.14.4,1Cor.14.5,1Cor.14.6,1Cor.14.9,1Cor.14.12,1Cor.14.13,1Cor.14.14&version=KJV
Here is a sample of a group glorifying the Lord in their natural tongue. Those whom speak Spanish and/or Portuguese can fully appreciate and understand what is being communicated. Those who do not have an interpreter only hears a sound and is moved by the emotion without understanding what is being communicated. This is why Paul expresses the need for an interpreter especially for unknown tongues.
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.
https://www.biblegateway.com/passage/?search=1Cor.13.1&version=KJV
In the law it is written, With men of other tongues and other lips will I speak unto this people; and yet for all that will they not hear me, saith the Lord. 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 ttherefore 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?
https://www.biblegateway.com/passage/?search=1Cor.14.21,1Cor.14.22,1Cor.14.23&version=KJV
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. For God is not the author of confusion, but of peace, as in all churches of the saints.
https://www.biblegateway.com/passage/?search=1Cor.14.27,1Cor.14.28,1Cor.14.33&version=KJV
In conclusion
For unto this purpose was the Gospel preached also unto the dead, that they might be condemned according to men in the flesh, but might live according to God in the spirit. Now the end of all things is at hand. Be ye therefore sober, and watching in prayer.
https://www.biblegateway.com/passage/?search=1Pet.4.6,1Pet.4.7&version=GNV
But, ye beloved, edify yourselves in your most holy faith, praying in the holy Ghost. And keep yourselves in the love of God, looking for the mercy of our Lord Jesus Christ, unto eternal life.
https://www.biblegateway.com/passage/?search=Jude.1.20,Jude.1.21&version=GNV