Exodus 12:1-6 ASV

1 And Jehovah spake unto Moses and Aaron in the land of Egypt, saying,
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.