Matthew 7:15
"Beware of false prophets, who come to you in sheep's clothing, but inwardly they are ravenous wolves.
1 John 4:1
Beloved, do not believe every spirit, but test the spirits to see whether they are of God; because many false prophets have gone out into the world.
Matthew 24:24
For false christs and false prophets will arise and show great signs and wonders to deceive, if possible, even the elect.
Romans 16:18
For such persons do not serve our Lord Christ, but their own appetites, and by smooth and flattering words they deceive the hearts of the simple.
2 Corinthians 11:3
But I am afraid that just as the serpent deceived Eve by his cunning, your minds may somehow be led astray from your sincere and pure devotion to Christ.
2 Corinthians 11:13-15
For such men are false apostles, deceitful workmen, disguising themselves as apostles of Christ.
2 Peter 2:1
But false prophets also arose among the people, just as there will also be false teachers among you, who will secretly introduce destructive heresies, even denying the Master who bought them, bringing swift destruction upon themselves.
Revelation 19:20
And the beast was captured, and with him the false prophet who had performed the signs in his presence, by which he deceived those who had received the mark of the beast and those who worshipped his image. These two were thrown alive into the lake of fire which burns with sulfur.