The country of Moab was of small extent, but very fruitful. It bordered upon the lot of Reuben on the other side Jordan and upon the Dead Sea. Naomi went to sojourn there when there was a famine in Canaan. This is the country which (it is here foretold) should be wasted and grievously harassed, not quite ruined, for we find another prophecy of its ruin (Jer. xlviii.), which was accomplished by Nebuchadnezzar. This prophecy here was to be fulfilled within three years (ch. xvi. 14), and therefore was fulfilled in the devastations made of that country by the army of the Assyrians, which for many years ravaged those parts, enriching themselves with spoil and plunder. It was done either by the army of Shalmaneser, about the time of the taking of Samaria, in the fourth year of Hezekiah (as is most probable), or by the army of Sennacherib, which, ten years after, invaded Judah. We cannot suppose that the prophet went among the Moabites to preach to them this sermon; but he delivered it to his own people, 1. To show them that, though judgment begins at the house of God, it shall not end there,—that there is a providence which governs the world and all the nations of it,—and that to the God of Israel the worshippers of false gods were accountable, and liable to his judgments. 2. To give them a proof of God's care of them and jealousy for them, and to convince them that God was an enemy to their enemies, for such the Moabites had often been. 3. That the accomplishment of this prophecy now shortly (within three years) might be a confirmation of the prophet's mission and of the truth of all his other prophecies, and might encourage the faithful to depend upon them.