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.