Yahweh spoke to Moses and Aaron in the land of Egypt, saying,
"This month shall be to you the beginning of months. It shall be the first month of the year to you.
Speak to all the congregation of Israel, saying, 'On the tenth day of this month, they shall take to them every man a lamb, according to their fathers' houses, a lamb for a household;
and if the household be too little for a lamb, then he and his neighbor next to his house shall take one according to the number of the souls; according to what everyone can eat you shall make your count for the lamb.
Your lamb shall be without blemish, a male a year old. You shall take it from the sheep, or from the goats:
and you shall keep it until the fourteenth day of the same month; and the whole assembly of the congregation of Israel shall kill it at evening.
They shall take some of the blood, and put it on the two side-posts and on the lintel, on the houses in which they shall eat it.
They shall eat the flesh in that night, roasted with fire, and unleavened bread. They shall eat it with bitter herbs.
Don't eat it raw, nor boiled at all with water, but roasted with fire; with its head, its legs and its inner parts.
You shall let nothing of it remain until the morning; but that which remains of it until the morning you shall burn with fire.
This is how you shall eat it: with your loins girded, your shoes on your feet, and your staff in your hand; and you shall eat it in haste: it is Yahweh's Passover.
For I will go through the land of Egypt in that night, and will strike all the firstborn in the land of Egypt, both man and animal. Against all the gods of Egypt I will execute judgments: I am Yahweh.
The blood shall be to you for a token on the houses where you are: and when I see the blood, I will pass over you, and there shall no plague be on you to destroy you, when I strike the land of Egypt.
This day shall be to you for a memorial, and you shall keep it a feast to Yahweh: throughout your generations you shall keep it a feast by an ordinance forever.
Seven days shall you eat unleavened bread; even the first day you shall put away yeast out of your houses, for whoever eats leavened bread from the first day until the seventh day, that soul shall be cut off from Israel.
In the first day there shall be to you a holy convocation, and in the seventh day a holy convocation; no manner of work shall be done in them, except that which every man must eat, that only may be done by you.
You shall observe the feast of unleavened bread; for in this same day have I brought your hosts out of the land of Egypt: therefore shall you observe this day throughout your generations by an ordinance forever.
In the first month, on the fourteenth day of the month at evening, you shall eat unleavened bread, until the twenty first day of the month at evening.
Seven days shall there be no yeast found in your houses, for whoever eats that which is leavened, that soul shall be cut off from the congregation of Israel, whether he be a sojourner, or one who is born in the land.
You shall eat nothing leavened. In all your habitations you shall eat unleavened bread.'"
Then Moses called for all the elders of Israel, and said to them, "Draw out, and take lambs according to your families, and kill the Passover.
You 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 of the door of his house until the morning.
For Yahweh will pass through to strike the Egyptians; and when he sees the blood on the lintel, and on the two side-posts, Yahweh will pass over the door, and will not allow the destroyer to come in to your houses to strike you.
You shall observe this thing for an ordinance to you and to your sons forever.
It shall happen when you have come to the land which Yahweh will give you, according as he has promised, that you shall keep this service.
It will happen, when your children ask you, 'What do you mean by this service?'
that you shall say, 'It is the sacrifice of Yahweh's Passover, who passed over the houses of the children of Israel in Egypt, when he struck the Egyptians, and spared our houses.'" The people bowed their heads and worshiped.
The children of Israel went and did so; as Yahweh had commanded Moses and Aaron, so they did.