Exodus 12:10-14

10And ye shall let none of it remain until the morning; and what remaineth of it until the morning ye shall burn with fire.

11And thus shall ye eat it: your loins shall be girded, your sandals on your feet, and your staff in your hand; and ye shall eat it in haste; it is Jehovah's passover.

12And I will go through the land of Egypt in that night, and smite all the firstborn in the land of Egypt, both man and beast; and against all the 1gods of Egypt I will execute judgment: I am Jehovah.

13And the blood shall be for you as a sign on the houses in which ye are; and when I see the blood, I will pass over you; and the plague shall not be among you for destruction, when I smite the land of Egypt.

14And this day shall be unto you for a memorial; and ye shall celebrate it [as] a feast to Jehovah; throughout your generations [as] an ordinance for ever shall ye celebrate it.