Exodus 12:1-4

The LORD said to Moses and Aaron in the land of Egypt, “This month will be the first month; it will be the first month of the year for you. Tell the whole Israelite community: On the tenth day of this month they must take a lamb for each household, a lamb per house. If a household is too small for a lamb, it should share one with a neighbor nearby. You should divide the lamb in proportion to the number of people who will be eating it.