Deuteronomy 18:19-21

New International Reader's Version

¹⁹ The prophet will speak in my name. But someone might not listen to what I say through the prophet. I will hold that person responsible for not listening. ²⁰ But suppose a prophet dares to speak in my name something I have not commanded. Or he speaks in the name of other gods. Then that prophet must be put to death.”

²¹ You will say to yourselves, “How can we know when a message hasn’t been spoken by the Lord?”