Romans 16:18
Turn away from them. For men of that stamp are not the slaves of Christ, but are slaves to their own appetites. By their smooth and fair speech they beguile the hearts of the innocent.
2 Corinthians 11:13-15
For such fellows are sham apostles of Christ.
Philippians 3:19
Their end is destruction, their belly is their god, their glory is in their shame, and their minds are set on earthly things.
2 Thessalonians 2:8-11
and then the lawless one will be revealed. Him the Lord will consume with the breath of his lips, and destroy with the brightness of his appearing;
2 Peter 2:1-3
But there were false prophets, too, among the people, just as among you also there will be false teachers. These will secretly bring in destructive sects, denying even the Master who bought them, and bringing swift ruin upon themselves.
2 Peter 2:13-19
suffering wrong as the wage of wrong which they have done. These are men who count it pleasure to carouse in open daylight; they are spots and blemishes reveling in their deceit, even while they are feasting with you.
1 John 4:1
Do not believe every spirit, beloved, but test the spirits to see whether they are of God; for many false prophets are gone out into the world.
Revelation 16:13-14
And I saw three unclean spirits, like frogs, coming out of the dragon's mouth, and the beast's mouth, and the false prophet's mouth.