'Speak In Tongues' in the Bible

I am willing, indeed, that you should all speak in tongues, but rather that you should prophesy; for greater is he that prophesies than he that speaks in tongues, unless he interprets, in order that the church may receive instruction.

I thank God that I speak in tongues more than you all.

If, then, the whole church come together into the same place, and all speak in tongues, and there come in unlearned men, or unbelievers, will they not say that you are mad?