Matthew 18:21

Then Peter came up and said to him, "Lord, how often is my brother to sin against me and be forgiven? Up to seven times?"

Luke 17:3-4

Take heed to yourselves. If your brother sins, check him, and if he repents forgive him.

Matthew 18:15

If your brother sins [against you], go and reprove him, as between you and him alone. If he listens to you, then you have won your brother over;

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
If your brother sins [against you], go and reprove him, as between you and him alone. If he listens to you, then you have won your brother over;
Luke 17:3
Take heed to yourselves. If your brother sins, check him, and if he repents forgive him.