Exodus 12:1-6 MSG

1 God said to Moses and Aaron while still in Egypt,
2 "This month is to be the first month of the year for you.
3 Address the whole community of Israel; tell them that on the tenth of this month each man is to take a lamb for his family, one lamb to a house.
4 If the family is too small for a lamb, then share it with a close neighbor, depending on the number of persons involved. Be mindful of how much each person will eat.
5 Your lamb must be a healthy male, one year old; you can select it from either the sheep or the goats.
6 Keep it penned until the fourteenth day of this month and then slaughter it - the entire community of Israel will do this - at dusk.