Leviticus 27:8-12

⁸If he be poor, and not able to pay tile estimation, he shall stand before tile priest: and as much as he shall value him at, and see him able to pay, so much shall he give.

⁹But a beast that may be sacrificed to the Lord, if ally one shall vow, shall be holy,

¹⁰And cannot be changed, that is to say, neither a better for a worse, nor a worse for a better. And if he shall change it: both that which was changed, and that for which it was changed, shall be consecrated to the Lord.

¹¹An unclean beast, which cannot be sacrificed to the Lord, if my man shall vow, shall be brought before the priest:

¹²Who judging whether it be good or bad, shall set the price: