Isaiah 41:29
"Behold, they are all vanity; their works are nothing: their molten images are wind and confusion."
Cross References (ranked by relevance)
Jeremiah 5:13
And the prophets shall become wind, and the word is not in them: thus shall it be done unto them.
Isaiah 41:24
Behold, ye are of nothing, and your work of nought: an abomination is he that chooseth you.
Habakkuk 2:18
What profiteth the graven image that the maker thereof hath graven it; the molten image, and a teacher of lies, that the maker of his work trusteth therein, to make dumb idols?