Leviticus 27:8-10

Contemporary English Version

⁸ If you have promised to give someone to me and can't afford to pay the full amount for that person's release, you will be taken to a priest, and he will decide how much you can afford.

⁹ If you promise to sacrifice an animal to me, it becomes holy, and there is no way you can set it free. ¹⁰ If you try to substitute any other animal, no matter how good, for the one you promised, they will both become holy and must be sacrificed.