Exodus 12:1-11 (Holy Saturday Vespers)
The LORD said to Moses and Aaron in the land of Egypt, "This month shall be for you the beginning of months; it shall be the first month of the year for you. Tell all the congregation of Israel that on the tenth day of this month they shall take every man a lamb according to their fathers' houses, a lamb for a household; and if the household is too small for a lamb, then a man and his neighbor next to his house shall take according to the number of persons; according to what each 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 this month, when the whole assembly of the congregation of Israel shall kill their lambs in the evening. 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 them. They shall eat the flesh that night, roasted; with unleavened bread and bitter herbs they shall eat it. Do not eat any of it raw or boiled with water, but roasted, its head with its legs and its inner parts. And you shall let none of it remain until the morning, anything that remains until the morning you shall burn. In this manner you shall eat it: your loins girded, your sandals on your feet, and your staff in your hand; and you shall eat it in haste. It is the LORD's passover.