Exodus 12:10-14

10Do not leave any of it until morning; before the morning you must burn up any part that is left over.

11This is how you are to eat it: You must be fully dressed for travel,1 with your sandals on your feet and your staff in your hand. You are to eat in haste; it is the LORD’s Passover.

12On that night I will pass through the land of Egypt and strike down every firstborn male, both man and beast, and I will execute judgment against all the gods of Egypt. I am the LORD. 13The blood on the houses where you are staying will be a sign; when I see the blood, I will pass over you. No plague will fall on you to destroy you when I strike the land of Egypt.

14And this day will be a memorial for you, and you are to celebrate it as a feast to the LORD, as a permanent statute for the generations to come.