Acts 12:7 in the King James Version
And, behold, the angel of the Lord came upon him, and a light shined in the prison: and he smote Peter on the side, and raised him up, saying, Arise up quickly. And his chains fell off from his hands.
Context
6 The same night when Herod was about to bring him out, Peter was sleeping between two soldiers, bound with two chains. Guards in front of the door kept the prison.
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 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.”