Leviticus 27:14-15 - Redemption Of Vowed Houses
14 And when a man shall sanctify his house to be holy to LORD, then the priest shall estimate it, whether it be good or bad. As the priest shall estimate it, so shall it stand. 15 And if he who sanctified it will redeem his house, then he shall add the fifth part of the money of thy estimation to it, and it shall be his.