Perhaps one reason God commanded Israel to observe the Passover throughout their generations was to foreshadow what he would do at the end of time when once again he would “pass over” his elect people while he destroyed their enemies. The Passover lamb’s proxy role of standing in for Israel’s firstborn sons would become clearer in a later time when “the Lamb of God that takes away the sins of the world” would be slain by Israel’s high priest at Passover.
Isaiah 26:20–21Come, O my people, enter your chambers and shut the doors behind you; hide yourselves a little while until the wrath is past. For now will Jehovah come out of his dwelling place to punish the inhabitants of the earth for their iniquities; the earth will uncover the blood shed upon it and no more conceal its slain.
Isaiah 31:5As birds hover over [the nest], so will Jehovah of Hosts guard Jerusalem; by protecting it he will deliver it, by passing over it, preserve it.
Isaiah 43:3–4I Jehovah am your God, [I,] the Holy One of Israel, am your Savior; Egypt I have appointed as ransom for you, Cush and Seba [I give] in place of you. Because you are precious and revered in my eyes, and because I love you, I give men in return for you, peoples in exchange for your life.
Isaiah 53:4–5, 7He bore our sufferings, endured our griefs, though we thought him stricken, smitten of God, and humbled. But he was pierced for our transgressions, crushed because of our iniquities; the price of our peace he incurred, and with his wounds we are healed. . . . He was harassed, yet submissive, and opened not his mouth — like a lamb led to slaughter, like a sheep, dumb before its shearers, he opened not his mouth.