The Ordinance of Passover

Exodus 12 ¹And the LORD spake unto Moses and Aaron in the land of Egypt, saying, ²This month shall be unto you the beginning of months: it shall be the first month of the year to you. ³Speak 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: ⁴And 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. ⁵Your lamb shall be without blemish, a male of the first year: ye shall take it out from the sheep, or from the goats: ⁶And 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. ⁷And 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. ⁸And they shall eat the flesh in that night, roast with fire, and unleavened bread; and with bitter herbs they shall eat it. ⁹Eat not of it raw, nor sodden at all with water, but roast with fire; his head with his legs, and with the purtenance thereof. ¹⁰And ye shall let nothing of it remain until the morning; and that which remaineth of it until the morning ye shall burn with fire. ¹¹And 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. ¹²For 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. ¹³And 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.
¹⁴And this day shall be unto you for a memorial; and ye shall keep it a feast to the LORD throughout your generations; ye shall keep it a feast by an ordinance for ever. ¹⁵Seven days shall ye eat unleavened bread; even the first day ye shall put away leaven out of your houses: for whosoever eateth leavened bread from the first day until the seventh day, that soul shall be cut off from Israel.

Exodus 12 ²¹Then Moses called for all the elders of Israel, and said unto them, Draw out and take you a lamb according to your families, and kill the passover. ²²And ye shall take a bunch of hyssop, and dip it in the blood that is in the basin, and strike the lintel and the two side posts with the blood that is in the basin; and none of you shall go out at the door of his house until the morning. ²³For the LORD will pass through to smite the Egyptians; and when he seeth the blood upon the lintel, and on the two side posts, the LORD will pass over the door, and will not suffer the destroyer to come in unto your houses to smite you. ²⁴And ye shall observe this thing for an ordinance to thee and to thy sons for ever. ²⁵And it shall come to pass, when ye be come to the land which the LORD will give you, according as he hath promised, that ye shall keep this service. ²⁶And it shall come to pass, when your children shall say unto you, What mean ye by this service? ²⁷That ye shall say, It is the sacrifice of the LORD'S passover, who passed over the houses of the children of Israel in Egypt, when he smote the Egyptians, and delivered our houses. And the people bowed the head and worshipped.
²⁸And the children of Israel went away, and did as the LORD had commanded Moses and Aaron, so did they.

²⁹And it came to pass, that at midnight the LORD smote all the firstborn in the land of Egypt, from the firstborn of Pharaoh that sat on his throne unto the firstborn of the captive that was in the dungeon; and all the firstborn of cattle.

Exodus 12 ²⁹And it came to pass, that at midnight the LORD smote all the firstborn in the land of Egypt, from the firstborn of Pharaoh that sat on his throne unto the firstborn of the captive that was in the dungeon; and all the firstborn of cattle. ³⁰And Pharaoh rose up in the night, he, and all his servants, and all the Egyptians; and there was a great cry in Egypt; for there was not a house where there was not one dead. ³¹And he called for Moses and Aaron by night, and said, Rise up, and get you forth from among my people, both ye and the children of Israel; and go, serve the LORD, as ye have said. ³²Also take your flocks and your herds, as ye have said, and be gone; and bless me also. ³³And the Egyptians were urgent upon the people, that they might send them out of the land in haste; for they said, We be all dead men. ³⁴And the people took their dough before it was leavened, their kneadingtroughs being bound up in their cloathes upon their shoulders. ³⁵And the children of Israel did according to the word of Moses; and they borrowed of the Egyptians jewels of silver, and jewels of gold, and raiment: ³⁶And the LORD gave the people favour in the sight of the Egyptians, so that they lent unto them such things as they required. And they spoiled the Egyptians.