Gen 4:4, Ex 12:3,7, Ex 29:38, Isa 53:7, Jn 1:29,36, Rev 22:1-5

Abel offered a sacrifice to God through faith in Christ who would come as the Lamb of God. (Heb 11:4, Gen 4:4)

Heb 11:4 By faith Abel offered unto God a more excellent sacrifice than Cain, by which he obtained witness that he was righteous, God testifying of his gifts: and by it he being dead yet speaketh.

Gen 4:4 And Abel, he also brought of the firstlings of his flock and of the fat thereof. And the Lord had respect unto Abel and to his offering:

In the Old Testament it was foretold that Christ would die like a Lamb for our sins. (Ex 12:3,7, Ex 29:38, Isa 53:7)

Ex 12:3 Speak ye unto all the congregation of Israel, saying, In the tenth day of this month they shall take to them every man a lamb, according to the house of their fathers, a lamb for an house: 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.

Ex 29:38 Now this is that which thou shalt offer upon the altar; two lambs of the first year day by day continually.

Isa 53:7 He was oppressed, and he was afflicted, yet he opened not his mouth: he is brought as a lamb to the slaughter, and as a sheep before her shearers is dumb, so he openeth not his mouth.

Jesus is the Christ who came as the Lamb of God. (Jn 1:29,36)

Jn 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. 36 And looking upon Jesus as he walked, he saith, Behold the Lamb of God!

We will see Jesus, the Lamb of God, in heaven. (Rev 22:1-5)

Rev 22:1 And he shewed me a pure river of water of life, clear as crystal, proceeding out of the throne of God and of the Lamb. 2 In the midst of the street of it, and on either side of the river, was there the tree of life, which bare twelve manner of fruits, and yielded her fruit every month: and the leaves of the tree were for the healing of the nations. 3 And there shall be no more curse: but the throne of God and of the Lamb shall be in it; and his servants shall serve him: 4 And they shall see his face; and his name shall be in their foreheads. 5 And there shall be no night there; and they need no candle, neither light of the sun; for the Lord God giveth them light: and they shall reign for ever and ever.