'Denying' in the Bible

holding to the form of godliness but denying its power. Avoid these people!

But there were also false prophets among the people, just as there will be false teachers among you. They will secretly bring in destructive heresies, even denying the Master who bought them, and will bring swift destruction on themselves.

For some men, who were designated for this judgment long ago, have come in by stealth; they are ungodly, turning the grace of our God into promiscuity and denying Jesus Christ, our only Master and Lord.