10 Christians gathered together for prayers in a church.
Everyone speaking in tongues.
No-one can faithfully interpret a word of utterance.
10 Christians continue speaking in tongues.
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.
1 Corinthians 14:27-28 KJV