Peter addresses a crowd in Jerusalem on the day of Pentecost and tells them that Jesus, who they crucified, has been resurrected and exalted by God as both Lord and Christ. He quotes scripture prophesying this and explaining that the pouring out of the Holy Spirit they are witnessing is the fulfillment of God's promise. The crowd asks what they should do, and Peter tells them to repent and be baptized to receive forgiveness and the Holy Spirit. Many then believe and are baptized, totaling about three thousand people added that day.