Acts 12:7-8

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.”