Jamieson, Fausset and Brown on Nahum 2:13

13. burn ... in the smoke--or (so as to pass) "into smoke," that is, "entirely" [Maurer], (Psa 37:20; 46:9). Calvin, like English Version, explains, As soon as the flame catches, and the fire smokes, by the mere smoke I will burn her chariots.

cut off thy prey from the earth--Thou shalt no more carry off prey from the nations of the earth.

the voice of thy messengers ... no more ... heard--No more shall thy emissaries be heard throughout thy provinces conveying thy king's commands, and exacting tribute of subject nations.