Acts 12:4-12

When he had seized Peter, he put him in prison, turning him over to four squads of soldiers of four each to guard him [in rotation throughout the night], planning after the Passover to bring him out before the people [for execution]. So Peter was kept in prison, but fervent and persistent prayer for him was being made to God by the church. The very night before Herod was to bring him forward, Peter was sleeping between two soldiers, bound with two chains, and sentries were in front of the door guarding the prison. Suddenly, an angel of the Lord appeared [beside him] and a light shone in the cell. The angel struck Peter’s side and awakened him, saying, “Get up quickly!” And the chains fell off his hands. The angel said to him, “Prepare yourself and strap on your sandals [to get ready for whatever may happen].” And he did so. Then the angel told him, “Put on your robe and follow me.” And Peter went out following the angel. He did not realize that what was being done by the angel was real, but thought he was seeing a vision. When they had passed the first guard and the second, they came to the iron gate that leads into the city. Of its own accord it swung open for them; and they went out and went along one street, and at once the angel left him. When Peter came to his senses, he said, “Now I know for certain that the Lord has sent His angel and has rescued me from the hand of Herod and from all that the Jewish people were expecting [to do to me].” When he realized what had happened, he went to the house of Mary the mother of John, who was also called Mark, where many [believers] were gathered together and were praying continually [and had been praying all night].