2 Corinthians 11:13-15
For such are false apostles, deceitful workmen, transforming themselves into apostles of Christ.
Matthew 7:15
Beware of the false prophets, who come to you in sheeps clothing, but inwardly are ravening wolves.
Philippians 3:2
Beware of the dogs, beware of the evil workmen, beware of the concision.
2 Peter 2:1-3
But there arose false prophets also among the people, as there will be false teachers among you also, who will stealthily bring in destructive factions, even denying the Lord that bought them; bringing upon themselves swift destruction.
1 John 4:1
Beloved, believe not every spirit, but try the spirits, whether they are of God; because many false prophets have gone forth into the world.