This one I cannot wait to use on my parents, family, or JW door knockers:
Deut 18: 20-22 NWT rev 1984
20 ?However, the prophet who presumes to speak in my name a word that I have not commanded him to speak or who speaks in the name of other gods, that prophet must die. 21 And in case you should say in your heart: ?How shall we know the word that Jehovah has not spoken?? 22 when the prophet speaks in the name of Jehovah and the word does not occur or come true, that is the word that Jehovah did not speak. With presumptuousness the prophet spoke it. You must not get frightened at him.?
Note, Deut. comes AFTER the Exodus!