(7) The angel of the Lord came upon him.--The phrase is identical with that of Luke 2:9. The absence of the article in the Greek leaves it open to render it either as "the angel" or "an angel." The "light" in this instance corresponds to the "glory of the Lord" in that.

In the prison.--Literally, in the dwelling, or chamber. The term appears to be used as an euphemism for "prison."

Verse 7. - An angel for the angel, A.V. (see note on Acts 5:19); stood by him for came upon him, A.V. (comp. Luke 2:9); cell for prison, A.V.; awoke him for raised him up, A.V. (ἤγειρεν αὐτὸν); rise for arise, A.V. Cell. The word οἴκημα, a dwelling, was used by the Athenians as an euphemism for a prison. It only occurs here in the New Testament, though it is a common Greek word. His chains fell off from his hands, showing that each hand bad been chained to a soldier. The loosening of the chains would enable him to rise without necessarily awakening the soldiers to whom he was fastened, and who would feel no difference in the chain which was attached to them.

12:6-11 A peaceful conscience, a lively hope, and the consolations of the Holy Spirit, can keep men calm in the full prospect of death; even those very persons who have been most distracted with terrors on that account. God's time to help, is when things are brought to the last extremity. Peter was assured that the Lord would cause this trial to end in the way that should be most for his glory. Those who are delivered out of spiritual imprisonment must follow their Deliverer, like the Israelites when they went out of the house of bondage. They knew not whither they went, but knew whom they followed. When God will work salvation for his people, all difficulties in their way will be overcome, even gates of iron are made to open of their own accord. This deliverance of Peter represents our redemption by Christ, which not only proclaims liberty to the captives, but brings them out of the prison-house. Peter, when he recollected himself, perceived what great things God had done for him. Thus souls delivered out of spiritual bondage, are not at first aware what God has wrought in them; many have the truth of grace, that want evidence of it. But when the Comforter comes, whom the Father will send, sooner or later, he will let them know what a blessed change is wrought.And behold, the angel of the Lord came upon him,.... Suddenly and at once, and stood by him; this was one of the ministering spirits sent forth by Christ, to minister to a servant of his:

and a light shined in the prison; the Syriac version renders it, "in the whole house"; and the word that is used does signify an habitation, or a dwelling house properly, but is used also by the Greek writers (f) for a prison: this was an uncommon light produced by the angel, partly as an emblem of the presence, majesty, and power of God, who was present, to work a great deliverance; and partly for the use of Peter, that when being awaked he might see to rise and walk by:

and he smote Peter on the side, and raised him up; he touched him on that side which lay uppermost, or punched him on it, in order to awake him, and raise him out of his sleep:

saying arise up quickly; without delay, make haste:

and his chains fell off from his hands; from both his hands, and were left with the soldiers, between whom he slept; which must be ascribed to an almighty power, which caused them to drop off.

(f) Vid Harpocratian Lex. p. 212.