10 Celebrate this festival each year at the same time.
11 The Lord will give you the land of the Canaanites, just as he promised you and your ancestors.
12 From then on, you must give him every firstborn son from your families and every firstborn male from your animals, because these belong to him.
13 You can save the life of a firstborn donkey by sacrificing a lamb; if you don't, you must break the donkey's neck. You must save every firstborn son.
14 In the future your children will ask what this ceremony means. Explain it to them by saying, “The Lord used his mighty power to rescue us from slavery in Egypt.
15 The king stubbornly refused to set us free, so the Lord killed the firstborn male of every animal and the firstborn son of every Egyptian family. This is why we sacrifice to the Lord every firstborn male of every animal and save every firstborn son.”
16 This ceremony will serve the same purpose as a sign on your hand or on your forehead to tell how the Lord's mighty power rescued us from Egypt.