(17) If he sanctify his field from the year of jubile.--That is, the above-named valuation of fifty shekels only applies if he makes the vow immediately after the expiration of the year of jubile, when the period covered by this estimation is forty-nine years.

27:14-25 Our houses, lands, cattle, and all our substance, must be used to the glory of God. It is acceptable to him that a portion be given to support his worship, and to promote his cause. But God would not approve such a degree of zeal as ruined a man's family.If he sanctify his field from the year of jubilee,.... The very year, as Aben Ezra, while it is current, or when it is past, and he immediately sanctifies it for an holy use, and one comes to redeem it, as Jarchi says, as soon as ever it is devoted, and a priest has valued it, and there is a purchaser of it:

according to thy estimation it shall stand; what price soever the priest set upon it, that it was to go at, and he that had a mind to purchase it might have it for it, unless it was he that devoted it, and then he was to give a fifth part more, as afterwards expressed.