Deuteronomy 13:15

“But that prophet or that dreamer of dreams shall be put to death because he has counseled rebellion against Yahweh your God who brought you from the land of Egypt and redeemed you from the house of slavery, to drive you from the way in which Yahweh your God commanded you to walk. So you shall purge the evil from among you.

But false prophets also arose among the people, just as there will also be false teachers among you, who will secretly introduce destructive heresies, even denying the Master who bought them, bringing swift destruction upon themselves.