'Speaks in a Tongue' in the Bible

For he that speaks in a tongue speaks not to men, but to God; for no one understands; but in the spirit he speaks mysteries.

He that speaks in a tongue edifies himself; but he that prophesies edifies the assembly.

Wherefore, let him that speaks in a tongue, pray that he may interpret.

If any one speaks in a tongue, let it be by two, or at the most by three, and in turn; and let one interpret;