DEUTERONOMY 18

20 But if any other person says that he is a prophet and dares to speak a message which he falsely says comes from me but which I did not tell him to speak, or if anyone who speaks a message that he says other gods [MTY] have revealed to him, he must be executed for doing that.’

21 But if you say to yourself, ‘How can we know if a message that someone tells us does not come from Yahweh?’ 22 The answer is that when someone speaks a message about what will happen in the future, a message that he says was revealed by Yahweh, if what he says does not happen, you will know that the message did not come from Yahweh. That person has wrongly claimed that it was revealed to him by Yahweh. So you do not need to be afraid of anything that he says."