Matthew 7:15
But beware of false prophets, who come to you in sheeps clothing, but inwardly they are ravenous wolves.
1 John 4:1
Beloved, believe not every spirit, but try the spirits, whether they are of God, because many false prophets are gone out into the world.
Matthew 24:24
For false Christs and false prophets shall arise and shew great signs and wonders, so that they would deceive (if it were possible) even the elect.
Romans 16:18
For such serve not the Lord Jesus Christ, but their own belly, and by good words and fair speeches, deceive the hearts of the simple.
2 Corinthians 11:3
But I fear lest as the serpent deceived Eve through his subtilty, so your minds should be corrupted from simplicity toward Christ.
2 Corinthians 11:13-15
For such are false apostles, deceitful workers, transforming themselves into apostles of Christ.
2 Peter 2:1
But there were false prophets also among the people, as there shall likewise be false teachers among you, who will privily bring in destructive heresies, even denying the Lord that bought them, and bring upon themselves swift destruction.
Revelation 19:20
And the wild beast was taken, and with him the false prophet, who had wrought the miracles before him, with which he deceived them who had the mark of the wild beast, and them who had worshiped his image. These two were cast alive into the lake of fire burning with brimstone.