Deuteronomy 18:18-20

Young's Literal Translation

¹⁸ a prophet I raise up to them, out of the midst of their brethren, like to thee; and I have given my words in his mouth, and he hath spoken unto them all that which I command him;

¹⁹ and it hath been -- the man who doth not hearken unto My words which he doth speak in My name, I require [it] of him.

²⁰ `Only, the prophet who presumeth to speak a word in My name -- that which I have not commanded him to speak -- and who speaketh in the name of other gods -- even that prophet hath died.