Acts 17:23
For as I passed by, and beheld your devotions, I found an altar with this inscription, TO THE UNKNOWN GOD. Whom therefore ye ignorantly worship, him declare I unto you.
1 Corinthians 14:13
Wherefore let him that speaketh in an unknown tongue pray that he may interpret.
1 Corinthians 14:14
For if I pray in an unknown tongue, my spirit prayeth, but my understanding is unfruitful.
1 Corinthians 14:19
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.
1 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.
1 Corinthians 14:27
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.
1 Corinthians 14:4
He that speaketh in an unknown tongue edifieth himself; but he that prophesieth edifieth the church.
2 Corinthians 6:9
As unknown, and yet well known; as dying, and, behold, we live; as chastened, and not killed;
Galatians 1:22
And was unknown by face unto the churches of Judaea which were in Christ: