'Tongues' in the Bible

And there appeared unto them cloven tongues like as of fire, and it sat upon each of them.

And they were all filled with the Holy Ghost, and began to speak with other tongues, as the Spirit gave them utterance.

Cretes and Arabians, we do hear them speak in our tongues the wonderful works of God.

For they heard them speak with tongues, and magnify God. Then answered Peter,

And when Paul had laid his hands upon them, the Holy Ghost came on them; and they spake with tongues, and prophesied.