Jamieson, Fausset & Brown

Rather, "With fire will Jehovah judge, and with His sword (He will judge) all flesh." The parallelism and collocation of the Hebrew words favor this (Isa 65:12). all flesh--that is, all who are the objects of His wrath. The godly shall be hidden by the Lord in a place of safety away from the scene of judgment (Isa 26:20-21; Psa 31:20; Th1 4:16-17).