Matthew 18:21

Then came Peter to him and said, Lord, how often shall my brother sin against me, and I forgive him?

Luke 17:3-4

Take heed to yourselves: if thy brother sin against thee, rebuke him, and if he repent, forgive him.

Matthew 18:15

But if thy brother shall sin against thee, go and tell him his fault, between thee and him alone: if he will 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?

Bible References

Till

Matthew 18:15
But if thy brother shall sin against thee, go and tell him his fault, between thee and him alone: if he will hear thee, thou hast gained thy brother.
Luke 17:3
Take heed to yourselves: if thy brother sin against thee, rebuke him, and if he repent, forgive him.