They shall not offer {d} wine offerings to the LORD, neither shall they be pleasing unto him: their sacrifices shall be unto them as the bread of mourners; all that eat thereof shall be polluted: for their bread {e} for their soul shall not come into the house of the LORD.

(d) All their doings both with regard to administration and religion, will be rejected as polluted things.

(e) The meat offering which they offered for themselves.Hosea 9:4 Parallel Commentaries

The Assyrian Captivity
The closing years of the ill-fated kingdom of Israel were marked with violence and bloodshed such as had never been witnessed even in the worst periods of strife and unrest under the house of Ahab. For two centuries and more the rulers of the ten tribes had been sowing the wind; now they were reaping the whirlwind. King after king was assassinated to make way for others ambitious to rule. "They have set up kings," the Lord declared of these godless usurpers, "but not by Me: they have made princes, …
Ellen Gould White—The Story of Prophets and Kings

Hosea
The book of Hosea divides naturally into two parts: i.-iii. and iv.-xiv., the former relatively clear and connected, the latter unusually disjointed and obscure. The difference is so unmistakable that i.-iii. have usually been assigned to the period before the death of Jeroboam II, and iv.-xiv. to the anarchic period which succeeded. Certainly Hosea's prophetic career began before the end of Jeroboam's reign, as he predicts the fall of the reigning dynasty, i. 4, which practically ended with Jeroboam's …
John Edgar McFadyen—Introduction to the Old Testament