Abraham offered Isaac as a burnt offering to God, but God made a ram to offer it as a burnt offering. Like the ram, Abraham had a foreknowledge that Christ would die for Abraham's sins. (Gen 22:12-13)
Gen 22:12 And he said, Lay not thine hand upon the lad, neither do thou any thing unto him: for now I know that thou fearest God, seeing thou hast not withheld thy son, thine only son from me. 13 And Abraham lifted up his eyes, and looked, and behold behind him a ram caught in a thicket by his horns: and Abraham went and took the ram, and offered him up for a burnt offering in the stead of his son.
In the Old Testament it was foretold that Christ would die for us. (Isa 53:5)
Isa 53:5 But he was wounded for our transgressions, he was bruised for our iniquities: the chastisement of our peace was upon him; and with his stripes we are healed.
God loves us and sent His Son as a propitiation to forgive our sins. (1 John 4:10)
1 John 4:10 Herein is love, not that we loved God, but that he loved us, and sent his Son to be the propitiation for our sins.
Jesus is the Lamb of God who died to take away the sins of the world. (John 1:29)
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.
Jesus offered his body to God as a propitiation to save us. (Heb 9:12, Gal 1:4)
Heb 9:12 Neither by the blood of goats and calves, but by his own blood he entered in once into the holy place, having obtained eternal redemption for us.
Gal 1:4 Who gave himself for our sins, that he might deliver us from this present evil world, according to the will of God and our Father: