isaiah 49:26 And I will feed them that oppress thee with their own flesh; and they shall be drunken with their own blood, as with sweet wine: and all flesh shall know that I the LORD am thy Saviour and thy Redeemer, the mighty One of Jacob. - Free Bible Online

      26. feed . . . own flesh--a phrase for internal strifes (Isa 9:20).
      own blood--a just retribution for their having shed the blood of God's servants (Re 16:6).
      sweet wine--that is, must, or new wine, the pure juice which flows from the heap of grapes before they are pressed; the ancients could preserve it for a long time, so as to retain its flavor. It was so mild that it required a large quantity to intoxicate; thus the idea here is that very much blood would be shed (Re 14:10, 20).
      all flesh shall, &c.--the effect on the world of God's judgments (Isa 66:15, 16, 18, 19; Re 15:3, 4).

JFB.