Numbers 5:7
and must confess the sin he has committed. He must make full restitution, add a fifth to its value, and give all this to the one he has wronged.
Berean Standard Bible
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.