Isaiah 49:26 - Matthew Poole's English Annotations on the Holy Bible

I will feed them that oppress thee with their own flesh; I will make them eat their own flesh, either through hunger, as Leviticus 26:29 Isaiah 9:20, or through rage and madness. Or, I will make thine enemies to destroy one another, and that greedily and with delight, as the next clause implies. All their enemies are here represented as one body; and so when one part of them devoured another, it was their own flesh that was destroyed.