Numbers 18:15-17

New International Version

¹⁵ The first offspring of every womb, both human and animal, that is offered to the Lord is yours.^(A) But you must redeem^(B) every firstborn^(C) son and every firstborn male of unclean animals.^{(D) 16} When they are a month old,^(E) you must redeem them at the redemption price set at five shekels^[a](F) of silver, according to the sanctuary shekel,^(G) which weighs twenty gerahs.^(H)

¹⁷ “But you must not redeem the firstborn of a cow, a sheep or a goat; they are holy.^(I) Splash their blood^(J) against the altar and burn their fat^(K) as a food offering, an aroma pleasing to the Lord.^(L)