Exodus 12:1-6 TMB

1 And the LORD spoke 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, `On the tenth day of this month they shall take for themselves every man a lamb, according to the house of their fathers, a lamb for a house.
4 And if the household be too little for the lamb, let him and his neighbor next unto his house take it according to the number of the souls; every man according to his eating shall make your count for the lamb.
5 Your lamb shall be without blemish, a male of the first year; ye shall take it out from the sheep, or from the goats.
6 And ye shall keep it up until the fourteenth day of the same month, and the whole assembly of the congregation of Israel shall kill it in the evening.