Leviticus 27:26-29

26‘But the firstborn of the animals, which should be the Lord’s firstborn, no man shall dedicate; whether it is an ox or sheep, it is the Lord’s.

27And if it is an unclean animal, then he shall redeem it according to your valuation, and shall add one-fifth to it; or if it is not redeemed, then it shall be sold according to your valuation.

28‘Nevertheless no devoted offering that a man may devote to the Lord of all that he has, both man and beast, or the field of his possession, shall be sold or redeemed; every devoted offering is most holy to the Lord.

29No person under the ban, who may become doomed to destruction among men, shall be redeemed, but shall surely be put to death.