Numbers 18:14-16 21st Century King James Version (KJ21)
14 Every thing devoted in Israel shall be thine.
15 Every thing that openeth the womb 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.
16 And those that are to be redeemed from a month old shalt thou redeem, according to thine estimation, for the money of five shekels, according to the shekel of the sanctuary which is twenty gerahs.