If, however, the owner decides to redeem the animal, he must add a fifth to its value.
This is part of the law concerning singular vows, extraordinary ones, which though God did not expressly insist on, yet, if they were consistent with and conformable to the general precepts, he would be well pleased with. Note, We should not only ask, What must we do, but, What may we do, for the glory and honour of God?
Commenting on Leviticus 27:1-13
And when a man shall sanctify his house to be holy unto the Lord,.... Shall set it apart for sacred service, devote it to holy uses, so that it may be sold, and the money laid out in sacrifices, the repairs of the temple, &c.
Shall add a fifth part - This was probably intended to prevent rash vows and covetous redemptions. The priest alone was to value the thing; and to whatever his valuation was, a fifth part must be added by him who wished to redeem the consecrated thing. Thus, if the priest valued it at forty shekels, if the former owner redeemed it he was obliged to give forty-eight.