Acts 12:7-11

And suddenly an angel of the Lord appeared [standing beside him], and a light shone in the place where he was. And the angel gently smote Peter on the side and awakened him, saying, Get up quickly! And the chains fell off his hands. And the angel said to him, Tighten your belt and bind on your sandals. And he did so. And he said to him, Wrap your outer garment around you and follow me. And [Peter] went out [along] following him, and he was not conscious that what was apparently being done by the angel was real, but thought he was seeing a vision. When they had passed through the first guard and the second, they came to the iron gate which leads into the city. Of its own accord [the gate] swung open, and they went out and passed on through one street; and at once the angel left him. Then Peter came to himself and said, Now I really know and am sure that the Lord has sent His angel and delivered me from the hand of Herod and from all that the Jewish people were expecting [to do to me].