'Speaks in a Tongue' in the Bible

For he who speaks in a tongue speaks not to men, but to God, for no man hears, but in spirit he speaks mysteries.

He who speaks in a tongue builds himself up, but he who prophesies builds up the congregation.

Therefore let him who speaks in a tongue pray that he may interpret.

If any man speaks in a tongue, be according to two, or at the most three, and in succession. And let one interpret.