Deuteronomy 18:19-21

21st Century King James Version

¹⁹ And it shall come to pass that whosoever will not hearken unto My words which He shall speak in My name, I will require it of him.

²⁰ But the prophet who shall presume 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, even that prophet shall die.’

²¹ And if thou say in thine heart, ‘How shall we know the word which the Lord hath not spoken?’—