Matthew 7:15
"Beware of false prophets, who, indeed, come to you in sheep's clothing, but within are ravening wolves.
Romans 16:18
For those who are such are not serving our Lord Christ, but their own belly; and, through their kind words and flattering speeches, they beguile the hearts of the simple.
2 Corinthians 11:13-15
For such men are false apostles, deceitful workers, transforming themselves into apostles of Christ;
Galatians 2:4
and that was because of the false brethren secretly introduced, who, indeed, crept in to spy out our liberty which we have in Christ Jesus, that they might bring us into bondage;
Ephesians 4:14
that we may no longer be babes, billow-tossed, and carried about with every wind of teaching, in the sleight of men, in the craftiness suited to the artifice of error;
2 Thessalonians 2:9-10
him whose coming is according to the working of Satan in all power and signs and lying wonders,
1 Timothy 4:1-2
But the Spirit expressly saith, that in later times, some will fall away from the faith, giving heed to seducing spirits, and to teachings of demons,
Titus 1:10-12
For there are many unruly men, vain-talkers and deceivers, especially those of the circumcision,
Revelation 13:11-14
And I saw another beast coming up out of the earth; and he had two horns like a lamb, and he was speaking as a dragon.
Revelation 19:20
And the beast was seized, and with him the false prophet that wrought the signs in his presence, with which he deceived those who received the mark of the beast, and who worshiped his image. The two were cast alive into the lake of fire that burns with brimstone.