Acts 12:7-8

7 And behold, an angel of the Lord stood by him, and a light shone in the cell. He struck Peter on the side, and woke him up, saying, "Stand up quickly!" His chains fell off from his hands.  8 The angel said to him, "Get dressed and put on your sandals." He did so. He said to him, "Put on your cloak, and follow me."