John Chrysostom : But what is "the sprinkling of blood"? A lamb was slain in every household, and the blood was smeared on the door-posts, and this was a means of warding off the Egyptian destruction. If then the blood of a lamb preserved the Jews unhurt in the midst of the Egyptians, and under so great a destruction, much more will the blood of Christ save us, who have had it sprinkled not on the door-posts, but in our souls. For even now also the Destroyer is going about in this depth of night: but let us be armed with that Sacrifice. (He calls the "sprinkling" anointing.) For God has brought us out from Egypt, from darkness, from idolatry. Although what was done, was nothing, what was achieved was great. For what was done was blood; but was achieved, was salvation, and the stopping, and preventing of destruction. The angel feared the blood; for he knew of what it was a Type; he shuddered, thinking on the Lord's death; therefore he did not touch the door-posts. Moses said, Smear, and they smeared, and were confident. And you, having the Blood of the Lamb Himself, are ye not confident? — Homily on Hebrews 27 Oecumenius : "By faith, he kept the Passover." For Moses said: "Mark the doorposts so that you may be saved," (Ex. 12:23) and they believed that they were to be saved. Indeed, they believed that they would be saved through the blood of the lamb, he says, and they achieved this. Therefore, how will you not believe even more that you are to be saved through the blood of Christ, and you will be saved from all who lie in wait for you? "and the sprinkling of blood." He called the sprinkling of blood the anointing of the doorposts, so that the Destroyer angel would not touch them. This was, however, a type of the blood of the Lamb of God. For through His blood we drive away the destroyer Satan. — The Pseudo-Oecumenian Catena on Hebrews Theodoret of Cyrus : How would he, without faith, have believed that death would be prevented by the blood of a sheep? He recognized in advance the reality in the type and had a premonition of the power of the Lord's blood. — INTERPRETATION OF Hebrews 11