So shall Bethel do unto you - God was the judge, who condemned them so to suffer from the enemy. The Assyrian was the instrument of the wrath of God. But, in order to point out the moral government of God, the prophet says, neither that God did it, nor that the Assyrian did it, but Bethel, once "the house of God," now the place where they dishonored God, "because of your great wickedness," literally, "the wickedness of your wickedness." In their wickedness itself, there was an essence of wickedness, malice within malice.
In a morning shall the king of Israel be cut off - Hoshea was cut off finally, leaving neither root nor branch. His kingdom perished; he left no memorial. Like the morning, he seemed to dawn on the troubles of his people: he sinned against God: and "in a morning," the kingdom, in "the multitude of" whose "mighty men" he trusted, "was cut off" forever.

So shall Beth-el do unto you - This shall be the consequence of your idolatry.
In a morning shall the king of Israel utterly be cut off - Suddenly, unexpectedly. Hoshea, the king of Israel, shall be cut off by the Assyrians. There are some allusions to facts in this chapter, which cannot be easily verified, as we have not sufficient acquaintance with the history of those times.

So shall Bethel do unto you, because of your great wickedness,.... Or, "because of the evil of your evil" (s); their extreme wickedness, and exceeding sinfulness; the evil of evils they were guilty of was their idolatry, their worshipping the calf at Bethel; and this was the cause of all their ruin: God was the cause of it; the king of Assyria the instrument; but the procuring or meritorious cause was their abominable wickedness at Bethel; which therefore should be as Betharbel; yea, the whole land should be, on the account of that, like unto it, or be spoiled as that was. Or the words may be rendered, "so will he do unto you, O Bethel" (t); that is, either God, or Shalman or Shalmaneser, shall do the same to Bethel as he did to Betharbel; utterly destroy it and its inhabitants, showing no mercy to age or sex;
in a morning shall the king of Israel be utterly cut off; meaning Hoshea the last king of Israel, and the kingdom entirely destroyed; so that afterwards there was no more king in Israel, nor has been to this day; there was not only an utter destruction of that king, but of all kingly power and government, and ever since the children of Israel have been without a king, Hosea 3:4; and this was to be done, and was done, in a "morning": in the beginning of his reign, as Joseph Kimchi; but this seems not so well to agree with the history, since it was in the ninth year of his reign that Samaria was taken: but the sense is, either that it would be certainly done, as sure as the morning came; or suddenly and quickly, as the morning light breaks forth; or in the morning of prosperity, when they were expecting light and good days, from their alliance with the king of Egypt, against the king of Assyria.
(s) "propter malitiam malitiae vestrae", Pagninus, Cocceius, Schmidt. (t) "sic faciet vobis, Deus, O Bethel", Drusius; "sic faciet vobis Salman, O Bethel", Schmidt.

So shall Beth-el do unto you--Your idolatrous calf at Beth-el shall be the cause of a like calamity befalling you.
your great wickedness--literally, "the wickedness of your wickedness."
in a morning--speedily as quickly as the dawn is put to flight by the rising sun (Hosea 6:4; Hosea 13:3; Psalm 30:5).
king--Hoshea.

Beth - el - The idolatry committed there. Do - Procure all this evil against you. In a morning - Possibly the Assyrians might assault the city towards morning and master it.