Our Passover

Purge out therefore the old leaven, that ye may be a new lump, as ye are unleavened. For even Christ our Passover is sacrificed for us. 1 Corinthians 5:7
In this verse from his first letter to the believers as Corinth, the apostle Paul refers to the Jewish festival known as the Passover. This was the most important religious celebration among the Jews.
Passover commemorated the “passing over” of the houses of the Israelites when God destroyed all the firstborn of the land of Egypt. This occurred as God’s final plague against Egypt to convince the pharaoh to release the nation of Israel from slavery. The Jews escaped God’s judgement by following His command to mark their houses with the blood of sacrificial lambs.
Jesus is Our Passover, Paul declares, because He shed His blood to bring deliverance for God’s people, just as the first sacrificial lambs inaugurated the first Passover. We remember His sacrifice with reverence every time we partake of Communion, the Lord’s Supper,
The imagery of leaven in connection with Passover also appears in this verse. Leaven is another word for yeast, an ingredient used to cause bread to rise. But the Israelites left Egypt in such a hurry on the first Passover that they didn’t have time to add leaven to their bread dough and wait for it to rise (see Exodus 12:34). Thus, whenever they observed this holiday from that day on, they were to eat unleavened bread. This part of Passover was known as the Feast of Unleavened Bread.
Paul refers to Christians in this verse as a “new lump,” because they were “unleavened.” Just as unleavened bread symbolizes the Israelites’ freedom from Egyptian slavery, so Christians are unleavened, or separated from sin and death, by the perfect Passover Lamb, Jesus Christ.