Exodus 12:3-13

³ Speak ye unto all the congregation of Israel, saying, In the tenth day of this month they shall take to them every man a lamb, according to the house of their fathers, a lamb for an house: ⁴ And if the household be too little for the lamb, let him and his neighbour next unto his house take it according to the number of the souls; every man according to his eating shall make your count for the lamb.

⁵ Your lamb shall be without blemish, a male of the first year: ye shall take it out from the sheep, or from the goats: ⁶ And ye shall keep it up until the fourteenth day of the same month: and the whole assembly of the congregation of Israel shall kill it in the evening.

⁷ And they shall take of the blood, and strike it on the two side posts and on the upper door post of the houses, wherein they shall eat it.

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

⁹ Eat not of it raw, nor sodden at all with water, but roast with fire; his head with his legs, and with the purtenance thereof.

¹⁰ And ye shall let nothing of it remain until the morning; and that which remaineth of it until the morning ye shall burn with fire.

¹¹ And thus shall ye eat it; with your loins girded, your shoes on your feet, and your staff in your hand; and ye shall eat it in haste: it is the LORD's passover.

¹² For I will pass through the land of Egypt this night, and will smite all the firstborn in the land of Egypt, both man and beast; and against all the gods of Egypt I will execute judgment: I am the LORD.

¹³ And the blood shall be to you for a token upon the houses where ye are: and when I see the blood, I will pass over you, and the plague shall not be upon you to destroy you, when I smite the land of Egypt.