The passage describes events from the day of Pentecost in Acts 2:1-13. It summarizes that the disciples were gathered together when something like a rushing wind filled the house and tongues of fire rested on each person, filling them with the Holy Spirit. They then began speaking in other languages, astonishing the visitors from other lands who heard the disciples proclaiming the works of God in their own native tongues. The visitors were confused and amazed, wondering what this meant.