Isaiah 16:2

“For it shall be, &c.] Or, “otherwise it shall be”f318; if ye do not pay this tribute: [that] as a wandering bird cast out of the nest: or, “as a wandering bird, the nest sent out”: that is, as a bird that has forsaken its nest, and wanders about, and its young ones are turned out of the nest, scarcely fledged, and unable to shift for themselves, but flutter about here and there, trembling and frightened, (see <202602>Proverbs 26:2): [so] the daughters of Moab shall be at the fords of Arnon: turned out of their houses, wandering up and down, not knowing where to go; unable to help themselves, and in the utmost fright and consternation, fleeing to the very borders of their land, as the fords…”

“cast out of . . . nest--rather, "as a brood cast out" (in apposition with "a wandering bird," or rather, wandering birds), namely, a brood just fledged and expelled from the nest in which they were hatched [HORSLEY]. Compare Isa 10:14; Deu 32:11. daughters of Moab--that is, the inhabitants of Moab. So Kg2 19:21; Psa 48:11; Jer 46:11; Lam 4:22 [MAURER]. at the fords--trying to cross the boundary river of Moab, in order to escape out of the land. EWALD and MAURER make "fords" a poetical expression for "the dwellers on Arnon," answering to the parallel clause of the same sense, "daughters of Moab."”

“For it shall be - It shall happen in the time of the calamity that shall come upon Moab. As a wandering bird - (See Isaiah 10:14.) The same idea is presented in Proverbs 27:8 : As a bird that wanders from her nest, So is a man that wandereth from his place. The idea here is that of a bird driven away from her nest, where the nest is destroyed, and the young fly about without any home or place of rest. So would Moab be when the inhabitants were driven from their dwellings. The reason why this is introduced seems to be, to enforce what the prophet had said in the previous verse - the duty of paying the usual tribute to the Jews, and seeking their protection. The time is coming, says the…”

“Cast out - Which knows not whither to go. Arnon - Which was the border of the land of Moab, where they were, with design to flee out of their land, tho' they knew not whither. Isaiah 16:3”

“as: Isa 13:14; Pro 27:8 cast out of the nest: or, a nest forsaken the fords: Num 21:13-15; Deu 2:36, Deu 3:8, Deu 3:12; Jos 13:16; Jdg 11:18 Isaiah 16:3”

“The advice does not remain without effect, but they embrace it eagerly."And the daughters of Moab will be like birds fluttering about, a scared nest, at the fords of the Arnon." "The daughters of Moab," like "the daughters of Judah," for example, in Psa 48:12, are the inhabitants of the cities and villages of the land of Moab. They were already like birds soaring about ( Pro 27:8), because of their flight from their own land; but here, as we may see from the expression תהיינה ... והיה, the simile is intended to depict the condition into which they would be thrown by the prophet's advice. The figure (cf., Isa 10:14) as well as the expression (cf., Isa 17:2) is thoroughly Isaiah's. It is a…”