Deuteronomy 18:19-20

19 aAnd whoever will bnot listen to my words that he shall speak in my name, I myself will require it of him. 20 cBut the prophet who presumes to speak a word in my name that I have not commanded him to speak, or
Or and
who speaks in the name of other gods, that same prophet shall die.’

2 Kings 2:24

24And he turned around, and when he saw them, ehe cursed them in the name of the Lord. And two she-bears came out of the woods and tore forty-two of the boys.
Copyright information for ESV