Matthew 7:15
Beware of false prophets; they come to you with the garb of sheep but at heart they are ravenous wolves.
2 Corinthians 11:13-15
'Apostles'? They are spurious apostles, false workmen ??they are masquerading as 'apostles of Christ.'
Galatians 1:8-9
Now even though it were myself or some angel from heaven, whoever preaches a gospel that contradicts the gospel I preached to you, God's curse be on him!
1 John 4:1
Do not believe every spirit, beloved, but test the spirits to see if they come from God; for many false prophets have emerged in the world.
Romans 1:21
Though they knew God, they have not glorified him as God nor given thanks to him; they have turned to futile speculations till their ignorant minds grew dark.