2 Peter 2:1

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 2:3

And through covetousness, they will make merchandise of you, by fictitious tales: to whom the punishment threatened of old lingers not, and their destruction slumbers not.

2 Peter 2:14-19

having eyes full of the adulteress, incessantly sinning, alluring unstable souls; having a heart exercised with insatiable desires; an accursed progeny:

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.

Treasury of Scripture Knowledge

Summary

Verily, verily, I say unto you, He that entereth not by the door into the sheepfold, but climbeth up some other way, the same is a thief and a robber.

The same

Bible References

He

2 Peter 2:1
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.
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.

The same

2 Peter 2:3
And through covetousness, they will make merchandise of you, by fictitious tales: to whom the punishment threatened of old lingers not, and their destruction slumbers not.