Deuteronomy 18:19-21

New King James Version

^19 (A)And it shall be that whoever will not hear My words, which He speaks in My name, I will require it of him. ²⁰ But ^(B)the prophet who presumes to speak a word in My name, which I have not commanded him to speak, or ^(C)who speaks in the name of other gods, that prophet shall die.’ ²¹ And if you say in your heart, ‘How shall we know the word which the Lord has not spoken?’—