Titus 3:10
Warn a man who is factious once, and then warn him a second time. After that, have nothing to do with him,
Romans 16:17
I urge you, brethren, to take note of those who cause divisions and difficulties, contrary to the doctrine which you have learned; avoid them.
2 John 1:10
If anyone comes to you and does not bring this teaching, do not receive him into your house or give him any greeting;
Matthew 18:15-17
"If your brother sins against you, go and tell him his fault, between you and him alone. If he listens to you, you have gained your brother.
1 Corinthians 5:4-13
In the name of our Lord Jesus, when you are assembled, and I with you in spirit, and the power of our Lord Jesus is present,
1 Corinthians 11:19
For there must be factions among you in order that those who are genuine among you may be recognized.
2 Corinthians 13:2
I warned those who sinned in the past and all the others, and I warn them now while absent, as I did when present the second time, that if I come again I will not spare them
Galatians 5:12
I wish that those who are troubling you would mutilate themselves!
Galatians 5:20
idolatry, sorcery, hatred, strife, jealousy, outbursts of anger, disputes, dissensions, factions,
2 Thessalonians 3:6
Now we command you, brethren, in the name of our Lord Jesus Christ, that you keep away from every brother who is living in idleness and not according to the tradition which you received from us.
2 Thessalonians 3:14
If anyone does not obey our instruction in this letter, take special note of that person and do not associate with him, so that he may be ashamed.
2 Timothy 3:5
holding a form of godliness but denying its power. Avoid such people.
2 Peter 2:1
But false prophets also arose among the people, just as there will also be false teachers among you, who will secretly introduce destructive heresies, even denying the Master who bought them, bringing swift destruction upon themselves.