Deuteronomy 13:5

13:5 As for that prophet or dreamer, he must be executed because he encouraged rebellion against the Lord your God who brought you from the land of Egypt, redeeming you from that place of slavery, and because he has tried to entice you from the way the Lord your God has commanded you to go. In this way you must purge out evil from within.

Deuteronomy 18:20

18:20 “But if any prophet presumes to speak anything in my name that I have not authorized him to speak, or speaks in the name of other gods, that prophet must die.

Jeremiah 48:10

48:10 A curse on anyone who is lax in doing the Lord’s work!

A curse on anyone who keeps from carrying out his destruction!

Zechariah 13:2-3

13:2 And also on that day,” says the Lord who rules over all, “I will remove the names of the idols from the land and they will never again be remembered. Moreover, I will remove the prophets and the unclean spirit from the land. 13:3 Then, if anyone prophesies in spite of this, his father and mother to whom he was born will say to him, ‘You cannot live, for you lie in the name of the Lord.’ Then his father and mother to whom he was born will run him through with a sword when he prophesies.

Revelation 19:20

19:20 Now the beast was seized, and along with him the false prophet who had performed the signs on his behalf – signs by which he deceived those who had received the mark of the beast and those who worshiped his image. Both of them were thrown alive into the lake of fire burning with sulfur.

Revelation 20:10

20:10 And the devil who deceived them was thrown into the lake of fire and sulfur, where the beast and the false prophet are too, and they will be tormented there day and night forever and ever.