Reference

2 Chronicles 18:17

And the king of Israel said to Jehoshaphat, Did I not tell thee that he would not prophesy good unto me, but evil?
15

And the king said to him, How many times shall I adjure thee that thou say nothing but the truth to me in the name of the Lord?

16

Then he said, I did see all Israel scattered upon the mountains, as sheep that have no shepherd: and the Lord said, These have no master; let them return therefore every man to his house in peace.

17

And the king of Israel said to Jehoshaphat, Did I not tell thee that he would not prophesy good unto me, but evil?

18

Again he said, Therefore hear the word of the Lord; I saw the Lord sitting upon his throne, and all the host of heaven standing on his right hand and on his left.

19

And the Lord said, Who shall entice Ahab king of Israel, that he may go up and fall at Ramoth–gilead? And one spake saying after this manner, and another saying after that manner.

Counter-Arguments

The strongest case that this verse does not belong in this theme.

Agency Representation

The verse describes a king's complaint about a prophet's message, but it does not contain any explicit mention or implication of a messenger speaking with the authority of a sender, nor does it discuss the nature of agency or representation. The prophet's message is presented as his own, not as a message delivered on behalf of another entity.