The diversion of metaphor here is somewhat repugnant to modern taste. The sword, like the locust, shall devour Nineveh. Yet Nineveh is immediately afterwards compared in its numbers, destructive influence, and sudden disappearance to the locust. It is a transition like St. Paul’s “going off at a word.” The comparison of the locust suggests the thought that Nineveh herself has been a locust-pest to the world, and the direction of the metaphor is thereupon suddenly changed. A paraphrase will best bring out the meaning. (15) “Hostile swords devour thee, as a locust swarm devours. Vainly clusters together thy dense population, itself another locust-swarm. (16) Yea, as the stars of heaven for number have been thy merchants, as a pest of locusts which plunders one day and is gone the next.”
Related Commentaries of Nahum 3:15
Nahum 3:15-16
15 There shall the fire devour thee; the sword shall cut thee off, it shall eat thee up like the cankerworm: make thyself many as the cankerworm, make thyself many as the locusts.
16 Thou hast multiplied thy merchants above the stars of heaven: the cankerworm spoileth,e and flieth away.