Numbers 5:6-8

6“Speak to the children of Israel: ‘When a man or woman commits any sin that men commit in unfaithfulness against the Lord, and that person is guilty,

7then he shall confess the sin which he has committed. He shall make restitution for his trespass in full, plus one-fifth of it, and give it to the one he has wronged.

8But if the man has no relative to whom restitution may be made for the wrong, the restitution for the wrong must go to the Lord for the priest, in addition to the ram of the atonement with which atonement is made for him.