How do we know Jesus is the fulfillment of the ram in Abraham's sacrifice?

In Genesis 22, after Abraham obediently prepares to sacrifice Isaac, God provides a ram caught in a thicket. This ram serves as a clear picture of Jesus Christ, who is our substitute and ultimate sacrifice. Just as the ram was offered in Isaac’s place, Christ took upon Himself the penalty for our sins, fulfilling the requirements of God's justice. This foreshadowing emphasizes the doctrine of substitutionary atonement, which is central to Reformed theology. Through Christ, God satisfies His own justice while providing salvation for His elect.