From the very beginning of history, the blood sacrifice of an innocent animal has played a part in man’s relationship with God. After Adam and Eve sinned against God in the Garden of Eden, God killed an innocent lamb so they would have clothing for their naked bodies. Later, their sons, Cain and Abel, were instructed to sacrifice an innocent lamb and offer it to God.
When the nation of Israel was formed, it was given specific instructions regarding the establishment of a priesthood and sacrificial system. Again, innocent lambs would be regularly sacrificed for sins. Once a year, Israel’s high priest would kill a spotless lamb and take the blood into the “most holy place” (the part of the temple in which God manifested His presence) to present it before the LORD so that the sins of the nation would be atoned for (covered).
All of these sacrifices served as pictures of a final and perfect sacrifice that God Himself would make for the sins of the world. That Sacrifice would be the sinless Son of God, Jesus Christ, who suffered the just wrath of God in our place and the rose again from the dead.
John 3:16 - "For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life."
John 1:29 "The next day John seeth Jesus coming unto him, and saith, Behold the Lamb of God, which taketh away the sin of the world."
I Peter 3:18 - "For Christ also hath once suffered for sins, the just for the unjust, that he might bring us to God, being put to death in the flesh, but quickened by the Spirit:"
Romans 1:3-4 "Concerning his [God's] Son Jesus Christ our Lord, which was made of the seed of David according to the flesh;
And declared to be the Son of God with power, according to the spirit of holiness, by the resurrection from the dead: