Charles Ellicott Commentary Jeremiah 27:9

"But as for you, hearken ye not to your prophets, nor to your diviners, nor to your dreams, nor to your soothsayers, nor to your sorcerers, that speak unto you, saying, Ye shall not serve the king of Babylon:" — Jeremiah 27:9 (ASV)

Therefore do not listen to your prophets.—The almost exhaustive list of the names given to the men who claimed the power of foresight may have been because each of the five names was characteristic of one or another of the five nations to whom the message was sent.

Of the names themselves, the prominent idea in “prophet” is that of full-flowing utterance; in “diviners,” that of casting lots, as in Ezekiel 21:21; in “dreamers,” what the English word indicates; in “enchanters,” that of practicing “veiled” or “secret” arts (Leviticus 19:26; Deuteronomy 18:10); in “sorcerers,” that of muttered and whispered spells (Isaiah 8:19; Isaiah 47:9–13; 2 Kings 9:22).

It is clear that the five nations of the confederacy were supported in their rebellion against Nebuchadnezzar by a unanimous prediction from men of all these classes, like that which lured Ahab to his destruction (1 Kings 22:22). Every oracle was tuned, as it were, in favor of the policy of resistance.