Acts 2:1-4, 38-39

And when the day of Pentecost was now come, they were all together in one place. And suddenly there came from heaven a sound as of the rushing of a mighty wind, and it filled all the house where they were sitting. And there appeared unto them tongues parting asunder, like as of fire; and it sat upon each one of them. And they were all filled with the Holy Spirit, and began to speak with other tongues, as the Spirit gave them utterance.

And Peter said unto them, Repent ye, and be baptized every one of you in the name of Jesus Christ unto the remission of your sins; and ye shall receive the gift of the Holy Spirit. For to you is the promise, and to your children, and to all that are afar off, even as many as the Lord our God shall call unto him.