Matthew 18:15; Matthew 18:21; Matthew 27:4

15 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.
21 Then came Peter to him, and said , Lord, how oft shall my brother sin against me, and I forgive him? till seven times?
4 Saying , I have sinned in that I have betrayed the innocent blood. And they said , What is that to us? see thou to that.