Gevurot Meyruach Hakodesh 2:2-4

And there was mitamuhl (suddenly) from Shomayim a sound like the rushing of a violent wind, and it filled the whole bais where they were sitting. And leshonot appeared to them, being divided as eish resting on each one of them, And all were filled with the Ruach Hakodesh, and they began to speak in leshonot acherot as the Ruach Hakodesh was giving the utterance to them.