Matthew 7:15
"Beware of the false teachers--men who come to you in sheep's fleeces, but beneath that disguise they are ravenous wolves.
Romans 16:18
For men of that stamp are not bondservants of Christ our Lord, but are slaves to their own appetites; and by their plausible words and their flattery they utterly deceive the minds of the simple.
2 Corinthians 11:13-15
For men of this stamp are sham apostles, dishonest workmen, assuming the garb of Apostles of Christ.
Galatians 2:4
Yet there was danger of this through the false brethren secretly introduced into the Church, who had stolen in to spy out the freedom which is ours in Christ Jesus, in order to rob us of it.
Ephesians 4:14
So we shall no longer be babes nor shall we resemble mariners tossed on the waves and carried about with every changing wind of doctrine according to men's cleverness and unscrupulous cunning, making use of every shifting device to mislead.
2 Thessalonians 2:9-10
The appearing of the Lawless one will be attended by various miracles and tokens and delusive marvels--for so Satan works--
1 Timothy 4:1-2
Now the Spirit expressly declares that in later times some will fall away from the faith, giving heed to deceiving spirits and the teachings of demons;
Titus 1:10-12
For there are many that spurn authority--idle, talkative and deceitful persons, who, for the most part, are adherents of the Circumcision.
Revelation 13:11-14
Then I saw another Wild Beast, coming up out of the earth. He had two horns like those of a lamb, but he spoke like a dragon.
Revelation 19:20
who had done the miracles in his presence with which he had led astray those who had received the mark of the Wild Beast, and those who worshipped his statue. Both of them were thrown alive into the Lake of fire that was all ablaze with sulphur.