Exodus 12:10-14

101And you shall not leave any of it over until morning, but whatever is left of it until morning, you shall completely burn with fire. 11Now you shall eat it in this way: with your garment 2belted around your waist, your sandals on your feet, and your staff in your hand; and you shall eat it in a hurry--it is 3the Lord’s Passover. 12For 4I will go through the land of Egypt on that night, and fatally strike all the firstborn in the land of Egypt, from the human firstborn to animals; and 5against all the gods of Egypt I will execute judgments--6I am the Lord. 137The blood shall be a sign for you on the houses where you 8live; and when I see the blood I will pass over you, and no plague will come upon you 9to destroy you when I strike the land of Egypt.

14‘Now 10this day shall be 11a memorial to you, and you shall celebrate it as a feast to the Lord; throughout your generations you are to celebrate it as 1213a permanent ordinance.