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 2:13-22
receiving the due reward of unrighteousness. These delight to spend the day in luxurious festivity: they are spots and blemishes, reveling in their deceits when they feast with you;
1 John 2:18-19
Young children, it is the last period. And as you have heard that the antichrist comes, so, now, there are many antichrists; whence you know that it is the last period.
1 John 4:1-6
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.
Jude 1:4-5
For certain men have come in privily, who long ago were before written to this very condemnation; ungodly men, perverting the favor of our God to lasciviousness, and denying the only sovereign Lord, even our Lord Jesus Christ.
Revelation 3:1
And by the messenger of the congregation in Sardis, write: These things says he who has the seven spirits of God, and the seven stars: I know your works, that you have a name that you live, but are dead.
Revelation 3:15-17
I know your works, that you are neither cold nor hot: I wish you were either cold or hot.