Titus 3:10
A man that is a sectary, reject, after the first and second admonition,
Romans 16:17
Now I beseech you, brethren, to mark those who make divisions and cause offenses in opposition to the teaching which you have learned, and avoid them.
2 John 1:10
If any one comes to you, and brings not this teaching, receive him not into your house, and do not wish him well:
Matthew 18:15-17
And if your brother sin against you, go and tell him of his fault between you and him alone; if he hear you, you have gained your brother.
1 Corinthians 5:4-13
in the name of our Lord Jesus Christ, when you and my spirit have come together, with the power of our Lord Jesus Christ,
1 Corinthians 11:19
for there must be sects among you, that the approved may be made known among you.
2 Corinthians 13:2
I have foretold, and now the second time, as if I was present, though being absent, I foretell to those who have sinned, and to all others, that, if I come again, I will not spare;
Galatians 5:12
that those who trouble you would even cut themselves off!
Galatians 5:20
idolatry, sorcery, enmities, strifes, jealousies, anger, party-spirit, divisions, sects,
2 Thessalonians 3:6
Now we command you, brethren, in the name of our Lord Jesus Christ, that you withdraw from every brother that walks disorderly, and not according to the tradition which he received from us.
2 Thessalonians 3:14
And if any one obey not our word by this letter, note that man, and do not keep company with him, that he may be ashamed;
2 Timothy 3:5
having a form of godliness, but denying its power: from these also turn away.
2 Peter 2:1
But there were false prophets among the people, as there will be false teachers also among you; and these will stealthily introduce ruinous sects, and deny the Lord that bought them, bringing upon themselves swift destruction: