Exodus 12:2-4

Revised Standard Version

² “This month shall be for you the beginning of months; it shall be the first month of the year for you. ³ Tell all the congregation of Israel that on the tenth day of this month they shall take every man a lamb according to their fathers’ houses, a lamb for a household; ⁴ and if the household is too small for a lamb, then a man and his neighbor next to his house shall take according to the number of persons; according to what each can eat you shall make your count for the lamb.