What did God require for Israel's survival in Exodus 12 and 13?
God required the blood of a lamb, placed on the doorpost, for Israel’s survival. If it was not placed there, they would never have survived. Israel was helpless and could not redeem herself; the Exodus redemption required God’s provision and the applied blood.
Les explains that the Exodus was a redemption in which God does the redeeming and Israel can do nothing: they had no armed forces, no economic clout, no political clout, and were helpless slaves. Redemption required a person, Moses, who was proven as God’s legitimate deliverer by sign miracles—the rod becoming serpents, and his hand becoming leprous and then healed. In Exodus 12 and 13 specifically, God required the blood of a lamb, placed on the doorpost, or they would never have survived. Les connects this to the New Testament: our Lamb is Christ, and the New Testament substantiates that.