Matthew 18 - NKJV

Moreover if your brother sins against you, go and tell him his fault between you and him alone. If he hears you, you have gained your brother.
Matthew 18:15 sin speaking listening
And if he refuses to hear them, tell it to the church. But if he refuses even to hear the church, let him be to you like a heathen and a tax collector.
Matthew 18:17 church sin listening

For where two or three are gathered together in My name, I am there in the midst of them.
Matthew 18:20 Jesus community prayer
Then Peter came to Him and said, “Lord, how often shall my brother sin against me, and I forgive him? Up to seven times?”
Jesus said to him, “I do not say to you, up to seven times, but up to seventy times seven.”
Matthew 18:21-22 forgiveness neighbor sin