Therefore ye shall see no more vanity, nor divine divinations: for I will deliver my people out of your hand: and ye shall know that I am the LORD. Ye shall see no more vanity - They pretended visions; but they were empty of reality.
Nor divine divinations - As God would not speak to them, they employed demons. Where God is not, because of the iniquity of the people, the devil is, to strengthen and support that iniquity. And if he cannot have his priests, he will have his priestesses; and these will have a Church like themselves, full of lying doctrines, and bad works.
Commentary on the Bible, by Adam Clarke [1831].