Leviticus 27:12

As thou valuest it, who art the priest— According to the valuation of the priest.

Note; (1.) A zealous heart is not only willing to its power, but above its power. (2.) We should be careful not to be hasty to vow, lest we involve ourselves in difficulties, and repent of our rashness. There is a zeal not according to knowledge. But when we have vowed to the Lord, we should pay without reserve or change: for he loveth the cheerful giver.