Thematic Bible: Dedicated to God, redemption of

If the vow is to give the kind of animal that people offer to Jehovah, it will be considered holy. Do not exchange or substitute animals, a good one for a bad one or a bad one for a good one. If you do exchange one animal for another, then both animals will be holy. If it is an unclean animal that cannot be brought to Jehovah as an offering, bring it in front of the priest. read more.
The priest will determine what its value is. The value will be whatever the priest decides. If you want to buy it back, you must pay its full value plus one-fifth more.

A firstborn animal already belongs to Jehovah because it was born first. Therefore, it cannot be set apart as holy. Whether it is a bull or a sheep, it belongs to Jehovah. If it is an unclean animal it must be bought back. The payment will be its full value plus one-fifth more. If it is not bought back, it must be sold at the value given it. However, everything dedicated to Jehovah for destruction, a person, an animal, or a field that belongs to you, must not be sold or bought back. Everything dedicated in that way is very holy. It belongs to Jehovah. read more.
People dedicated this way may not be bought back. They must be put to death. One-tenth of what comes from the land, whether grain or fruit, is holy and belongs to Jehovah. If you buy back any part of it, you must add one-fifth more to it. Every tenth head of cattle or sheep that you counted is holy and belongs to Jehovah. You must not look to see if it is good or bad or exchange it. If you do exchange it, both the first animal and its substitute will be holy. They may not be bought back.'