This verse is added only to confirm the former sentence. The Prophet indeed intimates, that the common people, as well as the chiefs, in vain trusted in their quiet state; for the Lord would destroy them all together, from the highest to the lowest. Behold, Jehovah, he says, commands etc.; by using the word commands, he means, that God had many reasons why he should take away and destroy them all. But he goes farther than this, and intimates that their destruction was dependent on the sole will of God; as though he said, "Though the Lord may not send for ministers of vengeance, though he may not prepare great forces, yet his word only, whenever it shall go forth, will consume you all." We now then perceive what the Prophet means by the word "commands." He afterwards adds, He will smite the great house with confusions, or, according to some, with breaking rss, resas, means properly to mingle. The Prophet therefore, I doubt not, refers here to those dreadful falls which commonly happen to great and splendid palaces. When a cottage is overturned so great a ruin is not occasioned by its weight; nay, when its ruin begins to appear, fragments fall down one after another, so that the whole work falls without any violence. This, I say, is the case with small and common houses; but when there is a great building, its downfall is tremendous. I am therefore inclined to render the word "confusion," and the difference between small and great houses will then be more evident. Great houses then shall be smitten with confusions, (mixtionibus, with minglings) but small houses shall be smitten with fissures or clefts. But yet, as I have already reminded you, the Prophet means that there would be a ruin, both to the principal men and to the common people, so that they would all perish, from the least to the greatest. We hence learn how great was the corruption of that people; for God punishes none but the wicked. It then follows that equity was everywhere subverted and that all orders of men were become vicious and corrupt. It follows --

The Lord commandeth and He will smite - Jerome: "If He commandeth, how doth He smite? If He smiteth, how doth He command? In that thing which He "commands" and enjoins His ministers, He Himself is seen to "smite." In Egypt the Lord declares that He killed the first-born, who, we read, were slain by "the destroyer" Exodus 12:23. The "breaches" denote probably the larger, "the cleft" the smaller ruin. The greater pile was the more greatly destroyed.

He will smote the great house with breaches - The great and small shall equally suffer; no distinction shall be made; rich and poor shall fall together; death has received his commission, and he will spare none. Horace has a sentiment precisely like this, Carm. Lib. i., Od. iv., 5:13.
Pallida mors aequo pulsat pede pauperum
Tabernas, Regumque Turres.
With equal pace impartial fate
Knocks at the palace as the cottage gate.
But this may refer particularly to the houses of the poor in Eastern countries; their mud walls being frequently full of clefts; the earth of which they are built seldom adhering together because of its sandiness.

For, behold, the Lord commandeth,.... Hath determined and ordered the judgment before, and what follows: Kimchi paraphrases it, hath decreed the earthquake, as in Amos 3:15; of which he understands the following:
and he will smite the great house with breaches; or "droppings" (h); so that the rain shall drop through:
and the little house with clefts; so that it shall fall to ruin; that is, he shall smite the houses both of great and small, of the princes, and of the common people, either with an earthquake, so that they shall part asunder and fall; or, being left without inhabitants, shall of course become desolate, there being none to repair their breaches. Some understand, by the "great house", the ten tribes of Israel; and, by the "little house", the two tribes of Judah and Benjamin; to which sense the Targum seems to incline,
"he will smite the great kingdom with a mighty stroke, and the little kingdom with a weak stroke.''
(h) "guttis, seu stillis", Piscator; "quae est minuta et rorans pluvia", Drusius.

commandeth, and he will smite--His word of command, when once given, cannot but be fulfilled (Isaiah 55:11). His mere word is enough to smite with destruction.
great house . . . little house--He will spare none, great or small (Amos 3:15). JEROME interprets "the great house" as Israel, and "the small house" as Judah: the former being reduced to branches or ruins, literally, "small drops"; the latter, though injured with "clefts" or rents, which threaten its fall, yet still permitted to stand.

For behold - It seems to be the continued speech of him who took care of the dead, Amos 6:10, God hath sent out war, famine, and pestilence. The great house - The palaces of great men shall have great breaches made in them, and the cottages of poor men shall, by lesser strokes, be ruined.