Leviticus 27:8-10

Common English Bible

⁸ But if financial difficulty prevents the promise maker from giving the full value, they must set the person before the priest. The priest will assign the person a value according to what the promise maker can afford.

⁹ If a solemn promise involves livestock that can be offered to the Lord, any such animal given to the Lord will be considered holy. ¹⁰ The promise maker cannot replace or substitute for it, either good for bad or bad for good. But if one should substitute one animal for another, both it and the substitute will be holy.