Numbers 5:5-10

And the LORD spoke to Moses, saying, “Speak to the people of Israel, When a man or woman commits any of the sins that people commit by breaking faith with the LORD, and that person realizes his guilt, he shall confess his sin that he has committed. And he shall make full restitution for his wrong, adding a fifth to it and giving it to him to whom he did the wrong. But if the man has no next of kin to whom restitution may be made for the wrong, the restitution for wrong shall go to the LORD for the priest, in addition to the ram of atonement with which atonement is made for him. And every contribution, all the holy donations of the people of Israel, which they bring to the priest, shall be his. Each one shall keep his holy donations: whatever anyone gives to the priest shall be his.”