Hosea 1:7

In contrast, the Lord would have compassion on the Southern Kingdom of Judah and deliver her from such a fate. He said He would do this by Yahweh their God, perhaps using His own name this way to impress on the Israelites who their true God was. He said He would not do this in battle, however. The Israelites relied on human arms and alliances, but the Judahites trusted in the Lord, generally speaking, so He delivered the Judahites supernaturally. He did it in 701 B.C. by killing 185,000 Assyrian soldiers in one night while they lay camped around Jerusalem (2 Kings 19:32-36; Isaiah 37). Jerusalem was the only great city that did not fall to the Assyrians during this invasion of Syria-Palestine. Judah’s sins were not as great as Israel’s at this time. Judah enjoyed a succession of four "good" kings (Joash, Amaziah, Uzziah, and Jotham), and Hosea may have received this prophecy when Uzziah or Jotham was reigning.

"The northern kingdom had arrogated the name of Israel to itself. It clung obstinately to the belief that its greater riches, area and strength showed that it was the true representative of God’s people. The mention of Judah underlines the vital truth that the rejection of the North in no way involved God’s complete repudiation of Israel’s sonship." [Note: Ellison, p. 105.]