Exodus 12:7-13

7And they shall take of the blood, and put [it] on the two door-posts and on the lintel of the houses in which they eat it.

8And they shall eat the flesh in that night, roast with fire, and unleavened bread; with bitter [herbs] shall they eat it.

9Ye shall eat none of it raw, nor boiled at all with water, but roast with fire; its head with its legs and with its in-wards.

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.