Matthew 18:21
Then Peter, having come to him, said, Lord, how often shall my brother sin against me, and I let him go? Till seven times?
Luke 17:3-4
Attend to yourselves: and if thy brother sin against thee, censure him; and if he should repent, let him go.
Matthew 18:15
And if thy brother sin against thee, retire, and refute him between thee and him alone; if he hear thee, thou hast gained thy brother.
Treasury of Scripture Knowledge
Summary
                            Then came Peter to him, and said, Lord, how oft shall my brother sin against me, and I forgive him? till seven times?                        
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Bible References
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                                        Matthew 18:15                                        
                                                                                                                                And if thy brother sin against thee, retire, and refute him between thee and him alone; if he hear thee, thou hast gained thy brother.
                                    
                                        Luke 17:3                                        
                                                            
                        Attend to yourselves: and if thy brother sin against thee, censure him; and if he should repent, let him go.