Matthew 7:15
And 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 be of God: for many false prophets are gone out into the world.
Matthew 24:24
for there shall rise up false Christs, and false prophets, who shall shew great signs and prodigies, so as to deceive, if possible, even the elect.
Romans 16:18
and avoid them; for such people serve not our Lord Jesus Christ, but their own belly; and by a soothing address and good words deceive the hearts of the innocent.
2 Corinthians 11:3
But I fear least as the serpent seduced Eve by his subtilty, so your minds should be corrupted from the purity that is in Christ.
2 Corinthians 11:13-15
For such are false apostles, deceitful workers, transformed into apostles of Christ.
2 Peter 2:1
But there were indeed false prophets among the people of old, as there will be also among you false teachers, who will privately introduce pernicious heresies, denying even the Lord that bought them, and bringing upon themselves swift destruction,
Revelation 19:20
And the beast was taken, and with him the false prophet, who had wrought signs before him, by which he deceived those who had received the mark of the beast, and those who worshipped his image. These both were cast alive into the lake of fire burning with brimstone.