Deuteronomy 18:18-20

American Standard Version

¹⁸ I will raise them up a prophet from among their brethren, like unto thee; and I will put my words in his mouth, and he shall speak unto them all that I shall command him. 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, that shall speak a word presumptuously in my name, which I have not commanded him to speak, or that shall speak in the name of other gods, that same prophet shall die.