Exodus 12:3-5

New Revised Standard Version, Anglicised Catholic Edition

³ Tell the whole congregation of Israel that on the tenth of this month they are to take a lamb for each family, a lamb for each household. ⁴ If a household is too small for a whole lamb, it shall join its closest neighbour in obtaining one; the lamb shall be divided in proportion to the number of people who eat of it. ⁵ Your lamb shall be without blemish, a year-old male; you may take it from the sheep or from the goats.