Numbers 5:7

[that person] shall confess the sin which he has committed, and shall make satisfaction for his trespass: he [shall pay] the principal, and shall add to it the fifth part, and shall make restoration to him against whom he has trespassed.

Then they shall confess their sin which they have done: and he shall recompense his trespass with the principal thereof, and add unto it the fifth part thereof, and give it unto him against whom he hath trespassed.

then he shall confess his sin which he has done; and he shall make restitution for his guilt in full, add to it the fifth part of it, and give it to him in respect of whom he has been guilty.