Luke 17:3-5

and if you see him going the wrong direction, cry out and correct him. If there is true repentance on his part, forgive him. No matter how many times in one day your brother sins against you and says, ‘I’m sorry; I am changing; forgive me,’ you need to forgive him each and every time.” Upon hearing this, the apostles said to Jesus, “Lord, you must increase our measure of faith!”