Exodus 12:7 And they shall take of the blood, and strike it on the two side posts and on the upper door post of the houses, wherein they shall eat it. 8 And they shall eat the flesh in that night, roast with fire, and unleavened bread; and with bitter herbs they shall eat it.
[Patriarchs & Prophets pp 277] After the institution of the tabernacle service the Lord chose unto Himself the tribe of Levi for the work of the sanctuary, instead of the first-born of the people. “They are wholly given unto Me from among the children of Israel,” He said. “Instead of the first-born of all the children of Israel, have I taken them unto Me.” Numbers 8:16. All the people were, however, still required, in acknowledgment of God's mercy, to pay a redemption price for the first-born son. Numbers 18:15, 16. The Passover was to be both commemorative and typical, not only pointing back to the deliverance from Egypt, but forward to the greater deliverance which Christ was to accomplish in freeing His people from the bondage of sin.
The sacrificial lamb represents “the Lamb of God,” in whom is our only hope of salvation. Says the apostle, “Christ our Passover is sacrificed for us.” 1 Corinthians 5:7. It was not enough that the paschal lamb be slain; its blood must be sprinkled upon the doorposts; so the merits of Christ's blood must be applied to the soul. We must believe, not only that He died for the world, but that He died for us individually. We must appropriate to ourselves the virtue of the atoning sacrifice. The hyssop used in sprinkling the blood was the symbol of purification, being thus employed in the cleansing of the leper and of those defiled by contact with the dead.
In the psalmist's prayer also its significance is seen: “Purge me with hyssop, and I shall be clean: wash me, and I shall be whiter than snow.” Psalm 51:7. The lamb was to be prepared whole, not a bone of it being broken: so not a bone was to be broken of the Lamb of God, who was to die for us. John 19:36. Thus was also represented the completeness of Christ's sacrifice. The flesh was to be eaten. It is not enough even that we believe on Christ for the forgiveness of sin; we must by faith be constantly receiving spiritual strength and nourishment from Him through His word. Said Christ, “Except ye eat the flesh of the Son of man, and drink His blood, ye have no life in you.
John 6:50 This is the bread which cometh down from heaven, that a man may eat thereof, and not die. 51 I am the living bread which came down from heaven: if any man eat of this bread, he shall live for ever: and the bread that I will give is my flesh, which I will give for the life of the world.
May God add His blessing to the study of His word. "Good night" and God bless!