Cross reference
Matthew 18:21
21 Then Peter came and said to him, Lord, what number of times may my brother do wrong against me, and I give him forgiveness? till seven times?
Luke 17:3-4
3 Give attention to yourselves: if your brother does wrong, say a sharp word to him; and if he has sorrow for his sin, let him have forgiveness.
4 And if he does you wrong seven times in a day, and seven times comes to you and says, I have regret for what I have done; let him have forgiveness.
Matthew 18:15
15 And if your brother does wrong to you, go, make clear to him his error between you and him in private: if he gives ear to you, you have got your brother back again.