From Slavery to Freedom: Pentecost

Exodus 19:
4 So Moses went down to the people. He consecrated them for worship, and they washed their clothes. 15 He told them, “Get ready for the third day, and until then abstain from having sexual intercourse.”

16 On the morning of the third day, thunder roared and lightning flashed, and a dense cloud came down on the mountain. There was a long, loud blast from a ram’s horn, and all the people trembled. 17 Moses led them out from the camp to meet with God, and they stood at the foot of the mountain. 18 All of Mount Sinai was covered with smoke because the Lord had descended on it in the form of fire. The smoke billowed into the sky like smoke from a brick kiln, and the whole mountain shook violently. 19 As the blast of the ram’s horn grew louder and louder, Moses spoke, and God thundered his reply.

Acts 2:
On the day of Pentecost[a] all the believers were meeting together in one place. 2 Suddenly, there was a sound from heaven like the roaring of a mighty windstorm, and it filled the house where they were sitting. 3 Then, what looked like flames or tongues of fire appeared and settled on each of them. 4 And everyone present was filled with the Holy Spirit and began speaking in other languages,[b] as the Holy Spirit gave them this ability.