PASSOVER IS THE REDEMPTION OF THE FIRSTBORN

Exodus 4:22 And thou shalt say unto Pharaoh, Thus saith the LORD, Israel is my son, even my firstborn:

Exodus 4:23 And I say unto thee, Let my son go, that he may serve me: and if thou refuse to let him go, behold, I will slay thy son, even thy firstborn.

Hebrews 12:22 But ye are come unto mount Sion, and unto the city of the living God, the heavenly Jerusalem, and to an innumerable company of angels,

Hebrews 12:23 To the general assembly and church of the firstborn, which are written in heaven, and to God the Judge of all, and to the spirits of just men made perfect,