Albert Barnes Commentary Hosea 10:15

"So shall Beth-el do unto you because of your great wickedness: at daybreak shall the king of Israel be utterly cut off." — Hosea 10:15 (ASV)

So shall Bethel do unto you - God was the judge, who condemned them to suffer so from the enemy. The Assyrian was the instrument of the wrath of God. But, to point out the moral government of God, the prophet says, neither God did it, nor 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.