Exodus 12:1-6

1 And the Lord said to Moses and Aaron in the land of Egypt,
2 Let this month be to you the first of months, the first month of the year.
3 Say to all the children of Israel when they are come together, In the tenth day of this month every man is to take a lamb, by the number of their fathers' families, a lamb for every family:
4 And if the lamb is more than enough for the family, let that family and its nearest neighbour have a lamb between them, taking into account the number of persons and how much food is needed for every man.
5 Let your lamb be without a mark, a male in its first year: you may take it from among the sheep or the goats:
6 Keep it till the fourteenth day of the same month, when everyone who is of the children of Israel is to put it to death between sundown and dark.
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