Luke 17:3
"Be on you guard! "If your brother sins, rebuke him, and if he repents forgive him.
Matthew 18:21
Just then Peter came to him, and asked him, "Lord, how often shall my brother sin against me, and I forgive him? till seven times?"
Matthew 18:15-17
"If your brother sins against you, go and show him, between yourself and him alone. If he listens, you have won your brother.
Luke 21:34
"But take heed to yourselves lest your hearts be surcharged with self-indulgence and drunkenness and worldly cares, and that day catches you suddenly like a trap.
Galatians 2:11-14
But when Cephas came to Antioch I resisted him to his face, because he stood self-condemned.
Ephesians 5:15
See to it, then, that you carry on your life carefully; not as foolish, but as wise men.
Hebrews 12:15
Look carefully that there be no one who falls back from the grace of God; that no root of bitterness springs up to trouble you, and by its means many become defiled.
James 5:19
My brothers, if any one of you strays from the truth, and some one brings him back,
2 John 1:8
Watch yourselves, that you do not lose what we have wrought, but that you receive a full reward.