Reference scripture: Exodus 12:5-7

The animals you choose must be year-old males without defect, and you may take them from the sheep or the goats. Take care of them until the fourteenth day of the month, when all the members of the community of Israel must slaughter them at twilight. Then they are to take some of the blood and put it on the sides and tops of the doorframes of the houses where they eat the lambs

When God had decided to free up Israel from the hands of the Egyptians, He ordered them to slaughter the lamb and he said the lambs chosen should be with no blemish. He also ordered them to smear the blood on their doors so that when he strikes, nothing should happen in the houses where there’s blood for He will pass.

And it happened that when the angel of death came that night, all the firstborns of the Egyptians were killed, even the animals. There was no house in Egypt of the Egyptians which had no death. That night he smote the firstborn of the Egyptians and the firstborn of their flocks. And as He passed where there was blood, the Israelites were protected.

After that, the Israelites were released. That was a foreshadow of that which was about to come. Those lambs stood in the place of the perfect Lamb, which is Jesus Christ, a Lamb without blemish. The lambs used were a foreshadow of that which was going to cause deliverance of the People of God. The blood protected Israel, it caused deliverance to them, and they were freed. To us as Christians, we are also protected under the powerful blood of Jesus Christ.