Every thing that openeth the matrix in all flesh, which they bring unto the LORD, whether it be of men or beasts, shall be thine: nevertheless the firstborn of man shalt thou surely redeem, and the firstling of unclean beasts shalt thou redeem.
Anything that opens the womb in all living beings, given to the LORD, whether it's from humans or animals, will belong to you. However, you must surely redeem the firstborn child of humans and the first offspring of unclean animals.