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.
And, behold, the angel (rather, 'an angel') of the Lord came upon him - expressive of the suddenness and unexpectedness of the visit (compare Luke 2:9, and Acts 23:11).
And a light shined in the prison, х en (G1722) too (G3588) oikeemati (G3612)] - 'in the chamber;' not the prison-house at large, but the cell in which Peter lay.
And he smote Peter on the side, and raised him up, saying, Arise up quickly. And his chains fell off from his hands.