Jamieson, Fausset & Brown

But the Pharisees said, He casteth out devils through the prince of the devils--"the demons through the prince of the demons." This seems to be the first muttering of a theory of such miracles which soon became a fixed mode of calumniating them--a theory which would be ridiculous if it were not melancholy as an outburst of the darkest malignity. (See on Mat 12:24, &c.).