Thus saith the Lord God of Israel,.... Who had been, still was, and would be, Israel's God, even the God of such who are Israelites indeed; though he should, as he would, give up the present generation to ruin and destruction; they having by their sins forfeited his care and protection of them; and therefore it was in vain to hope for it from this character which they bore:behold, I will turn back the weapons of war that [are] in your hands; so that they should do no hurt to the enemy, but recoil upon themselves.
The meaning is, that they should be useless and unserviceable; that they should neither be defensive to them, nor offensive to their enemies; but rather hurtful to themselves.