"The Gods of Pegāna: Of How Imbaun Spake of Death to the King" by Lord Dunsany

The picture used is "Elijah is led to his confrontation with King Ahab." Elijah had a better time of it than did Imbaun, but still, it's a Prophet v. King image, so there you go.

The follow along: https://gutenberg.org/cache/epub/8395/pg8395-images.html#OF_HOW_IMBAUN_SPAKE_OF_DEATH_TO_THE_KING