Numbers 18:15-17

World English Bible

¹⁵ Everything that opens the womb, of all flesh which they offer to Yahweh, both of man and animal, shall be yours. Nevertheless, you shall surely redeem the firstborn of man, and you shall redeem the firstborn of unclean animals. ¹⁶ You shall redeem those who are to be redeemed of them from a month old, according to your estimation, for five shekels of money, according to the shekel^[a] of the sanctuary, which weighs twenty gerahs.^[b]

¹⁷ “But you shall not redeem the firstborn of a cow, or the firstborn of a sheep, or the firstborn of a goat. They are holy. You shall sprinkle their blood on the altar, and shall burn their fat for an offering made by fire, for a pleasant aroma to Yahweh.