Exodus 12:5
Your lamb shall be without blemish, a male of the first year: ye shall take it out from the sheep, or from the goats:
More from Exodus 12
Verse 1
And the LORD spake unto Moses and Aaron in the land of Egypt, saying,
Verse 2
This month shall be unto you the beginning of months: it shall be the first month of the year
Verse 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 the house of their fathers, a lamb for an house:
Verse 4
And if the household be too little for the lamb, let him and his neighbour 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.