The Holy Spirit came with power on the disciples
Acts 2:1–4 (ASV)
And when the day of Pentecost was now come, they were all together in one place. 2And 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. 3And there appeared unto them tongues parting asunder, like as of fire; and it sat upon each one of them. 4And they were all filled with the Holy Spirit, and began to speak with other tongues, as the Spirit gave them utterance.
Acts 2:4–11 (ASV)
4And they were all filled with the Holy Spirit, and began to speak with other tongues, as the Spirit gave them utterance.
5Now there were dwelling at Jerusalem Jews, devout men, from every nation under heaven. 6And when this sound was heard, the multitude came together, and were confounded, because that every man heard them speaking in his own language. 7And they were all amazed and marvelled, saying, Behold, are not all these that speak Galilaeans? 8And how hear we, every man in our own language wherein we were born? 9Parthians and Medes and Elamites, and the dwellers in Mesopotamia, in Judaea and Cappadocia, in Pontus and Asia, 10in Phrygia and Pamphylia, in Egypt and the parts of Libya about Cyrene, and...