Deuteronomy 18:19-21

Modern English Version

¹⁹ It will be that whoever will not listen to My words which he will speak in My name, I will require it of him. ²⁰ But the prophet, who presumes to speak a word in my name, which I have not commanded him to speak, or who shall speak in the name of other gods—that prophet shall die.”

²¹ And you may say in your heart, “How can we know the word which the Lord has not spoken?”