Adam Clarke on Isaiah 17:8

The altars, the work of his hands "The altars dedicated to the work of his hands" - The construction of the words, and the meaning of the sentence, in this place are not obvious; all the ancient Versions, and most of the modern, have mistaken it. The word מעשה maaseh, "the work," stands in regimine with מזבחות mizbechoth, "altars," not in opposition to it; it means the, altars of the work of their hand; that is of the idols, which are the work of their hands. Thus Kimchi has explained it, and Le Clerc has followed him.