Titus 3:10
An heretical person after a first and second admonition reject;
Romans 16:17
Now I beseech you, brethren, keep a sharp eye over those who cause divisions and offences contrary to the doctrine ye have learned, and turn away from them.
2 John 1:10
If any person come unto you, and bring not this doctrine, receive him not into the house, nor say to him, Welcome.
Matthew 18:15-17
Now if thy brother sin against thee, go and reprove him between thyself and him alone; if he hear thee, thou hast gained thy brother.
1 Corinthians 5:4-13
in the name of our Lord Jesus Christ, ye being assembled together and my spirit with the power of our Lord Jesus Christ,
1 Corinthians 11:19
For there must be heresies among you, that they who are the tried ones, may be made manifest among you.
2 Corinthians 13:2
I have told you before, and I repeat it, as when I was present the second time, and now absent, I write to those who have sinned already, and to all the rest, that if I come again, I will not spare you:
Galatians 5:12
I wish that they who trouble you were cut off from you.
Galatians 5:20
idolatry, magical charms, enmities, strifes, jealousies, animosities, quarrels, divisions, heresies,
2 Thessalonians 3:6
Now we command you, brethren, in the name of our Lord Jesus Christ, to withdraw yourselves from every brother who walketh disorderly, and not according to the injunction which he hath received from us.
2 Thessalonians 3:14
And if any man obey not our word by letter, mark that man, and maintain no society with him, that he may be ashamed.
2 Timothy 3:5
holding the form of godliness, but denying the power of it: from these men turn with aversion.
2 Peter 2:1
BUT there were false prophets among the people, as there will be false teachers also among you, who wickedly introduce damnable heresies, and deny the sovereign Lord who bought them, bringing on themselves swift destruction.