Leviticus 27:32-34

New Century Version

³² “‘The priest will take every tenth animal from a person’s herd or flock, and it will be holy to the Lord. ³³ The owner should not pick out the good animals from the bad or exchange one animal for another. If that happens, both animals will become holy; they cannot be bought back.’”

³⁴ These are the commands the Lord gave to Moses at Mount Sinai for the people of Israel.