What does the Bible say about false preachers?

In Titus 1, Paul identifies false preachers as unruly and vain talkers who cannot be controlled, leading people away from the truth of God. Their teachings often contradict the gospel and are motivated by selfish desires, often described as 'filthy lucre's sake.' These individuals, especially among the circumcision, are called out for their misleading ways, and the apostle Paul emphasizes the need to rebuke them sharply for the sake of the faith and the well-being of the flock. The seriousness of their deception is highlighted in the urgency to stop their mouths, as they subvert whole households through falsehoods and lies.