Adam Clarke on Deuteronomy 4:28

There ye shall serve gods - wood and stone - This was also true of the Israelites, not only in their captivities, but also in their own land. And it may now be literally the case with the ten tribes who were carried away captive by the Assyrians, and of whose residence no man at present knows any thing with certainty. That they still exist there can be no doubt; but they are now, most probably, so completely incorporated with the idolaters among whom they dwell, as to be no longer distinguish able: yet God can gather them.