Acts of Emissaries of Yeshua (Act) 2:1-4

The festival of Shavu‘ot arrived, and the believers all gathered together in one place. Suddenly there came a sound from the sky like the roar of a violent wind, and it filled the whole house where they were sitting. Then they saw what looked like tongues of fire, which separated and came to rest on each one of them. They were all filled with the Ruach HaKodesh and began to talk in different languages, as the Spirit enabled them to speak.