How do we know the significance of the lamb in Exodus 12?

In Exodus 12, the unblemished lamb represents the purity and worthiness required for a sacrifice. This lamb must be without blemish to serve as an acceptable substitute for the sins of God's people. The blood of the lamb, applied to the Israelites' homes, protected them from God's judgment, symbolizing how Jesus Christ, the Lamb of God, provides atonement for our sins (1 Peter 1:19). The parallels between the Passover lamb and Christ are profound, illustrating that Christ's death and sacrifice was the fulfillment of these ancient foreshadowings, providing salvation for all who believe in Him.