Acts 12:5-9

Peter therefore was kept in the prison: but prayer was made earnestly of the church unto God for him. And when Herod was about to bring him forth, the same night Peter was sleeping between two soldiers, bound with two chains: and guards before the door kept the prison. And behold, an angel of the Lord stood by him, and a light shined in the cell: and he smote Peter on the side, and awoke him, saying, Rise up quickly. And his chains fell off from his hands. And the angel said unto him, Gird thyself, and bind on thy sandals. And he did so. And he saith unto him, Cast thy garment about thee, and follow me. And he went out, and followed; and he knew not that it was true which was done by the angel, but thought he saw a vision.