In the story of Abraham and Isaac, God asked Isaac to sacrifice his one and only son. Abraham was about to carry out the sacrifice, but God stopped him. Instead, God provided a ram to be used as the sacrifice. (Genesis 22)

In the story of Moses and plagues of Egypt, the final plague required the blood of a lamb to be placed on the doorframes of the houses. The sign of that blood protected the household and the firstborn of that family would be killed. (Exodus 12)

In the commandments regarding sin offerings in Leviticus, God gives Moses these instructions:

“When anyone is guilty in any of these ways, he must confess in what way he has sinned and, as a penalty for the sin he has committed, he must bring to the LORD a female lamb or goat from the flock as a sin offering; and the priest shall make atonement for him for his sin."  Leviticus 5:5-6

God throughout the Old Testament set up for the sacrifice of Jesus on the cross.

Like the story of Abraham, God provided a sacrifice for us, only this time it was His son.

Like the story of Passover, God protects those who believe Jesus died (spilled his blood) for their sins and keeps them from an eternal separation from God (a death in hell).

Like the sin offerings, something must die for our sins and God chose Jesus to be the sacrifice for all of us.

The next question is “why would God do such a thing” and that’s found in John 3:16. God so loved the world. . .