Albert Barnes Commentary Daniel 2:3

"And the king said unto them, I have dreamed a dream, and my spirit is troubled to know the dream." — Daniel 2:3 (ASV)

And the king said to them, I have dreamed a dream, and my spirit was troubled to know the dream—That is, clearly, to know all about it; to recollect distinctly what it was, and to understand what it meant. He was agitated by so remarkable a dream; he probably had, as Jerome remarks, a shadowy and floating impression of what the dream was—such as we often have of a dream that has agitated our minds, but of which we cannot recall the distinct and full image; and he desired to recall that distinctly, and to know exactly what it meant. See (Daniel 2:1).