Matthew 7:15 "Beware of the false prophets, who come to you in sheep's clothing, but inwardly are ravenous wolves.

Galatians 1:8 But even if we, or an angel from heaven, should preach to you a gospel contrary to what we have preached to you, he is to be accursed!

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 leads an unruly life 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 will be put to shame.

1 Timothy 1:3 As I urged you upon my departure for Macedonia, remain on at Ephesus so that you may instruct certain men not to teach strange doctrines,

1 Timothy 6:3 If anyone advocates a different doctrine and does not agree with sound words, those of our Lord Jesus Christ, and with the doctrine conforming to godliness,

Titus 3:10 Reject a factious man after a first and second warning,

2 John 1:10 If anyone comes to you and does not bring this teaching, do not receive him into your house, and do not give him a greeting; (NASB ©1995)