2 Peter 2:1-3

But there were also falseprophets among the people, just as there will befalse teachers among you. They will secretlyintroduce destructive heresies, even denying thesovereign Lord who bought them–bringing swiftdestruction on themselves. Many will follow their shameful ways and will bring the way of truth into disrepute. In their greed these teachers will exploit you with stories they have made up. Their condemnation has long been hanging over them, and their destruction has not been sleeping.
(彼得後書2 Peter 2:1-3)