isaiah 10:18 And shall consume the glory of his forest, and of his fruitful field, both soul and body: and they shall be as when a standardbearer fainteth. - Free Bible Online

      18. glory of his forest--The common soldiers, the princes, officers, &c., all alike together, shall be consumed (see on Isa 9:18).
      in one day-- (Isa 37:36).
      fruitful field--literally, "Carmel," a rich mountain in the tribe of Asher. Figurative for Sennacherib's mighty army. Perhaps alluding to his own boasting words about to be uttered (Isa 37:24), "I will enter the forest of his Carmel."
      soul and body--proverbial for utterly; the entire man is made up of soul and body.
      as when a standard bearer fainteth--rather, "they shall be as when a sick man" (from a Syriac root) wastes away." Compare "leanness," that is, wasting destruction (Isa 10:16) [MAURER]. Or, "there shall be an entire dissipation, like a perfect melting" (namely, of the Assyrian army) [HORSLEY].

JFB.