If a man reconciles two people, but the reconciliation was not based on the Book and the Sunnah, does he sin?

Question:
May Allah reward you, Honorable Shaykh. This questioner says: If a man reconciles two disputing parties regarding money, and they are satisfied with this reconciliation, but the reconciliation was not based on the Book and the Sunnah, does this man sin, or do the disputing parties sin?

Answer:
If there is injustice and oppression in it, it is not permissible. If there is injustice and oppression in it, it is not permissible. Reconciliation is only to be done with justice. So, reconcile between them with justice and be fair, for Allah loves those who are fair. Yes. As for if there is injustice and oppression in it, it is not called reconciliation; rather, it is called oppression. Yes.