1 John 4:1
Beloved, do not believe every spirit, but try the spirits, whether they be from God; because many false prophets are gone forth into the world.
2 Peter 2:1-3
But there were also false prophets among the people, even as there will be false teachers among you; who will privately introduce destructive sects, denying even the Lord who bought them, bringing on themselves swift destruction.
2 Peter 2:18
for, speaking great swelling words of falsehood, they allure by the lusts of the flesh, even by lasciviousness, those who have actually fled away from them who are living in error.
1 John 2:19
They went away from us, but they were not of us. For, if they had been of us, they would have abode with us; but they went away, that they might be made manifest that they were not of us.
1 John 2:26
These things I have written to you, concerning them who deceive you;
Jude 1:12
These men are spots in love feasts, when they feast with you, feeding themselves without fear. They are clouds without water, carried about of winds: withered autumnal trees without fruit; twice dead; rooted out;
Revelation 13:11-14
And I saw another beast ascending out of the earth, and it had two horns like a lamb: but it spoke like a dragon.
Revelation 19:20
And the beast was taken captive, and with him the false prophet, who had wrought signs before him, by which he deceived those who received the mark of the beast, and those who worshiped his image; both of whom were cast alive into the lake of fire which burned with brimstone.