If another believer sins against you, go privately and point out the offense. If the other person listens and confesses it, you have won that person back.
Moreover if thy brother shall trespass against thee, go and tell him his fault between thee and him alone: if he shall hear thee, thou hast gained thy brother.
If another member of the church sins against you, go and point out the fault when the two of you are alone. If the member listens to you, you have regained that one.
Then if my people who are called by my name will humble themselves and pray and seek my face and turn from their wicked ways, I will hear from heaven and will forgive their sins and restore their land.