Exodus 12:4 ASV

²  This month shall be unto you the beginning of months: it shall be the first month of the year to you.

³  Speak ye unto all the congregation of Israel, saying, In the tenth 'day' of this month they shall take to them every man a lamb, according to their fathers' houses, a lamb for a household:

⁴  and if the household be too little for a lamb, then shall he and his neighbor next unto his house take one according to the number of the souls; according to every man's eating ye shall make your count for the lamb.

⁵  Your lamb shall be without blemish, a male a year old: ye shall take it from the sheep, or from the goats:

⁶  and ye shall keep it until the fourteenth day of the same month; and the whole assembly of the congregation of Israel shall kill it at even.