Acts of the Apostles 12:5-7

But while Peter was in prison, the church prayed very earnestly for him. The night before Peter was to be placed on trial, he was asleep, fastened with two chains between two soldiers. Others stood guard at the prison gate. Suddenly, there was a bright light in the cell, and an angel of the Lord stood before Peter. The angel struck him on the side to awaken him and said, “Quick! Get up!” And the chains fell off his wrists.