(Exodus 12: 1-7) The Lord said to Moses and Aaron in the land of Egypt, “This month shall be for you the beginning of months; it shall be the first month of the year for you. Tell all the congregation of Israel that on the tenth day of this month they shall take every man a lamb according to their fathers’ houses, a lamb for a household; and if the household is too small for a lamb, then a man and his neighbor next to his house shall take according to the number of persons; according to what each can eat you shall make your count for the lamb. Your lamb shall be without blemish, a male a year old; you shall take it from the sheep or from the goats; and you shall keep it until the fourteenth day of this month, when the whole assembly of the congregation of Israel shall kill their lambs in the evening. Then they shall take some of the blood, and put it on the two doorposts and the lintel of the houses in which they eat them.
(21-23) Then Moses called all the elders of Israel, and said to them, “Select lambs for yourselves according to your families, and kill the passover lamb. Take a bunch of hyssop and dip it in the blood which is in the basin, and touch the lintel and the two doorposts with the blood which is in the basin; and none of you shall go out of the door of his house until the morning. For the Lord will pass through to slay the Egyptians; and when he sees the blood on the lintel and on the two doorposts, the Lord will pass over the door, and will not allow the destroyer to enter your houses to slay you.
(29-32) At midnight the Lord smote all the first-born in the land of Egypt, from the first-born of Pharaoh who sat on his throne to the first-born of the captive who was in the dungeon, and all the first-born of the cattle. And Pharaoh rose up in the night, he, and all his servants, and all the Egyptians; and there was a great cry in Egypt, for there was not a house where one was not dead. And he summoned Moses and Aaron by night, and said, “Rise up, go forth from among my people, both you and the people of Israel; and go, serve the Lord, as you have said. Take your flocks and your herds, as you have said, and be gone; and bless me also!”
This is the testimony and prime example of how God delivered his people from bondage and oppression. It speaks of how God delivers those in bondage to sin, those repentant and contrite who call on Him and acknowledge His sacrifice, Jesus Christ. They mark the entrance of their hearts with the precious blood of the Lamb of God and will experience a spiritual Passover from certain death to eternal life.