2 Peter 2:1
But false prophets also arose among the people, just as there will be false teachers among you, who will secretly bring in destructive heresies, even denying the Master who bought them — the false teachers (pseudodidaskaloi) introduce heresies (haireseisanapherousin) with stealth, suggesting subversive infiltration rather than open opposition. The denial of the Master who bought them (despotēs agorazō) assaults both divine authority and redemptive purchase. The personal nature of their denial (even denying) makes their error not merely doctrinal but treacherous.