2 Peter 2:1; Revelation 2:1-2

2 Peter 2:1

1 But there were also false prophets among the people, just as there will be false teachers among you. They will secretly introduce destructive heresies, even denying the sovereign Lord who bought them—bringing swift destruction on themselves.

Revelation 2:1-2

1 “To the angelof the church in Ephesus write: These are the words of him who holds the seven stars in his right hand and walks among the seven golden lampstands.

2 I know your deeds, your hard work and your perseverance. I know that you cannot tolerate wicked people, that you have tested those who claim to be apostles but are not, and have found them false.