For the Lord will pass though to smite the Egyptians,.... All the firstborn in the several families, in all the towns and cities in Egypt: and when he seeth the blood upon the lintel, and upon the two side posts; which must be understood of his taking notice of it with a special view to the good of those within the house; otherwise every thing is seen by his all seeing eye: and thus Christ, the Lamb of God, is in the midst of the throne, as though he had been slain, and is always in the view of God and his divine justice; and his blood, righteousness, and sacrifice, are always looked unto by him with pleasure, delight, and satisfaction, to the advantage of his people, as applied unto them, who are hereby accepted with him, justified in his sight, and secure from condemnation and wrath: the Lord will pass over the door; and the house where this blood is sprinkled, and go to the next, or where Egyptians dwell; and thus justice passes over, and passes by, acquits and discharges them who are interested in the blood and sacrifice of Christ: and will not suffer the destroyer to come in unto your houses to smite you; the destroying angel, as the Targum of Jonathan; for he seems to be distinct from the Lord, who is said to pass through and pass over, being an attendant and minister of his, to execute vengeance upon the Egyptians; and whether a good or a bad angel, it matters not, since God can make use of either to inflict judgments on men; but it may be more probably the former, even such an one as was employed in destroying the whole host of the Assyrians in one night, Kg2 19:35 and answers better in the antitype or emblem to the justice of God taking vengeance on ungodly sinners, when it is not suffered to do the saints any harm.