The firstborn of every womb which they present to the Lord, whether human or animal, will be yours. Nevertheless, the firstborn sons you must redeem, and the firstborn males of unclean animals you must redeem.

From the Israelites' half-share you are to take one portion out of fifty of the people, the cattle, the donkeys, and the sheep -- from every kind of animal -- and you are to give them to the Levites, who are responsible for the care of the Lord's tabernacle."