Leviticus 23:5 In the first month, on the fourteenth day of the month in the evening, is Yahweh’s Passover.
The Passover commemorates Israel’s deliverance from bondage. They had been enslaved in Egypt for 400 years. On Passover the blood of a spotless lamb was sprinkled on the doorposts and the lamb was consumed in preparation for their journey. The angel of death passed over the homes where the Israelites had painted the lamb’s blood on their wooden doorposts.
When, in time to come, your children will ask you, “What mean the decrees, laws, and rules that the Lord God our God has enjoyed upon you?” You shall say to your children, “We were slaves to Pharaoh in Egypt and the Lord freed us from Egypt with a mighty hand. The Lord wrought before our eyes marvelous and destructive signs and portents in Egypt, against Pharaoh and all of his household; and us He freed from there, that He might take us and give us the land that He promised on oath to our fathers. The Lord commanded us to observe all these laws, to fear and revere the Lord our God, for our lasting good and survival, as is now the case. It will be therefore to our merit before the Lord our God to observe faithfully this whole instruction, as He has commanded us.” Deuteronomy 6:20-25
Of course, this Old Covenant festival looked forward to the sacrifice of Christ on a wooden cross. By his shed blood and broken body Christ stood in our place taking the punishment that we deserved. As John the Baptist announced, Behold the Lamb of God who takes away the sins of the world. John 1:29
By his death he [broke] the power of him who holds the power of death – that is the devil – and freed those who all their lives were held captive in slavery by their fear of death. Hebrews 2:14-15