Leviticus 27:15

15 And if he that has sanctified it should redeem his house, he shall add to it the fifth part of the money of the valuation, and it shall be his.

Leviticus 27:15 In-Context

13 And if will at all redeem it, he shall add the fifth part to its value.
14 And whatsoever man shall consecrate his house as holy to the Lord, the priest shall make a valuation of it between the good and the bad: as the priest shall value it, so shall it stand.
15 And if he that has sanctified it should redeem his house, he shall add to it the fifth part of the money of the valuation, and it shall be his.
16 And if a man should hallow to the Lord a part of the field of his possession, then the valuation shall be according to its seed, fifty didrachms of silver for a homer of barley.
17 And if he should sanctify his field from the year of release, it shall stand according to his valuation.

The Brenton translation of the Septuagint is in the public domain.