Deuteronomy 18:17-22

17The Lord then said to me, “What they have said is good.

18I will raise up a prophet like you for them from among their fellow Israelites. I will put my words in his mouth and he will speak to them whatever I command.

19I will personally hold responsible anyone who then pays no attention to the words that prophet speaks in my name.

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.

21Now if you say to yourselves, ‘How can we tell that a message is not from the Lord?’ –

22whenever a prophet speaks in my name and the prediction is not fulfilled, then I have not spoken it; the prophet has presumed to speak it, so you need not fear him.”