Acts 2:4-11

and they were all filled with the holy Spirit, and began to speak in other languages, as the Spirit gave them utterance.

1 Corinthians 14:2-11

For he, that speaketh in an unknown tongue, speaketh not to men, but to God: for no one understandeth, though in spirit he speaketh mysteries.

1 Corinthians 14:23

If then the whole church be come together and all speak in unknown tongues, and there come in illiterate persons, or infidels, will they not say that ye are mad?

Treasury of Scripture Knowledge

Summary

Go to, let us go down, and there confound their language, that they may not understand one another's speech.

Confound

Bible References

Confound

Acts 2:4
and they were all filled with the holy Spirit, and began to speak in other languages, as the Spirit gave them utterance.

May

1 Corinthians 14:2
For he, that speaketh in an unknown tongue, speaketh not to men, but to God: for no one understandeth, though in spirit he speaketh mysteries.