Leviticus 27:9

⁷And if from sixty years old and upward, if it be a male, his valuation shall be fifteen didrachmas of silver, and if a female, ten didrachmas.

⁸And if the man be too poor for the valuation, he shall stand before the priest; and the priest shall value him: according to what the man who has vowed can afford, the priest shall value him.

— Leviticus 27:9 —

¹⁰He shall not change it, a good for a bad, or a bad for a good; and if he do at all change it, a beast for a beast, it and the substitute shall be holy.

¹¹And if it be any unclean beast, of which none are offered as a gift to the Lord, he shall set the beast before the priest.