The LORD said to Moses and Aaron in Egypt,
References for Exodus 12:1
“This month is to be for you the first month, the first month of your year.
References for Exodus 12:2
Tell the whole community of Israel that on the tenth day of this month each man is to take a lamb for his family, one for each household.
References for Exodus 12:3
If any household is too small for a whole lamb, they must share one with their nearest neighbor, having taken into account the number of people there are. You are to determine the amount of lamb needed in accordance with what each person will eat.