The document summarizes the events of Pentecost from Acts chapters 1 and 2. It describes how the disciples were gathered together in Jerusalem, devoting themselves to prayer. They selected Matthias to replace Judas as one of the twelve apostles. On the day of Pentecost, they experienced the coming of the Holy Spirit with signs like a rushing wind and tongues of fire. They began speaking in other languages and proclaiming the gospel. About 3,000 people responded to Peter's message and were baptized, becoming the first members of the church.