Exodus 12:1–13
The Passover
[1] The LORD said to Moses and Aaron in the land of Egypt, [2] “This month shall be for you the beginning of months. It shall be the first month of the year for you. [3] Tell all the congregation of Israel that on the tenth day of this month every man shall take a lamb according to their fathers’ houses, a lamb for a household. [4] And if the household is too small for a lamb, then he and his nearest neighbor shall take according to the number of persons; according to what each can eat you shall make your count for the lamb. [5] Your lamb shall be without blemish, a male a year old. You may take it from the sheep or from the goats, [6] and you shall keep it until the fourteenth day of this month, when the whole assembly of the congregation of Israel shall kill their lambs at twilight.
[7] “Then they shall take some of the blood and put it on the two doorposts and the lintel of the houses in which they eat it. [8] They shall eat the flesh that night, roasted on the fire; with unleavened bread and bitter herbs they shall eat it. [9] Do not eat any of it raw or boiled in water, but roasted, its head with its legs and its inner parts. [10] And you shall let none of it remain until the morning; anything that remains until the morning you shall burn. [11] In this manner you shall eat it: with your belt fastened, your sandals on your feet, and your staff in your hand. And you shall eat it in haste. It is the LORD’s Passover. [12] For I will pass through the land of Egypt that night, and I will strike all the firstborn in the land of Egypt, both man and beast; and on all the gods of Egypt I will execute judgments: I am the LORD. [13] The blood shall be a sign for you, on the houses where you are. And when I see the blood, I will pass over you, and no plague will befall you to destroy you, when I strike the land of Egypt. (ESV)