The Moabites, who had once lorded over Israel Judges 3:12-14, were reduced to subjection by David, and treated with extreme severity (marginal reference). In the time of Ahab they were dependent on the kingdom of Israel, to which it has been generally supposed that they fell at the separation of Israel from Judah. The Moabite monument (see 2-Kings 3:4), discovered in 1869, has now given reason to believe that they then recovered their independence, but were again reduced by Omri, who, with his son Ahab, is said (in round numbers) to have "oppressed" them for "forty years." Ahab's death was seized upon as an occasion for revolt, and Moab (perhaps owing to Ahaziah's sickness) easily regained her independence.

Moab rebelled - The Moabites had been subdued by David, and laid under tribute, 2-Kings 3:4, and 2-Samuel 8:2. After the division of the two kingdoms, the Moabites fell partly under the dominion of Israel, and partly under that of Judah, until the death of Ahab, when they arose and shook off this yoke. Jehoram confederated with the king of Judah and the king of Edom, in order to reduce them. See this war, 2-Kings 3:5.

Then Moab rebelled against Israel after the death of Ahab.
The Argument - This second book contains the acts of the kings of Judah and Israel: that is, of Israel, from the death of Ahab to the last king Hoshea, who was imprisoned by the king of Assyria, and his city Samaria taken, and the ten tribes led into captivity by the just plague of God for their idolatry and disobedience to God. Also of Judah, from the reign of Jehoram son of Jehoshaphat to Zedekiah, who for contemning the Lord's commandment by his prophets, and neglecting his many admonitions by famine and other means was taken by his enemies, saw his sons most cruelly slain before his face, and his own eyes put out, as the Lord had declared to him before by his prophet Jeremiah. By the just vengeance of God for contempt of his word Jerusalem was destroyed, the temple burnt, and he and all his people were led away captives into Babylon. In this book are notable examples of God's favour toward those rulers and people who obey his prophets, and embrace his word: and contrariwise of his plagues on those who neglect his ministers, and do not obey his commandments.

Then Moab rebelled against Israel after the death of Ahab. Which had been in subjection to them from the times of David, 2-Samuel 8:2 refusing to pay a tribute as they had done; taking advantage of Ahab's ill success with the king of Syria, and of his death, and the condition and circumstances of his successor.

When Ahaziah rebelled against the Lord, Moab revolted from him. Sin weakens and impoverishes us. Man's revolt from God is often punished by the rebellion of those who owe subjection to him. Ahaziah fell through a lattice, or railing. Wherever we go, there is but a step between us and death. A man's house is his castle, but not to secure him against God's judgments. The whole creation, which groans under the burden of man's sin, will, at length, sink and break under the weight like this lattice. He is never safe that has God for his enemy. Those that will not inquire of the word of God for their comfort, shall hear it to their terror, whether they will or no.

MOAB REBELS. (2-Kings 1:1)
Then Moab rebelled--Subdued by David (2-Samuel 8:2), they had, in the partition of Israel and Judah, fallen to the share of the former kingdom. But they took advantage of the death of Ahab to shake off the yoke (see on 2-Kings 3:6). The casualty that befell Ahaziah [2-Kings 1:2] prevented his taking active measures for suppressing this revolt, which was accomplished as a providential judgment on the house of Ahab for all these crimes.

After the death of Ahab, Moab rebelled against Israel (2-Kings 1:1). The Moabites, who had been subjugated by David (2-Samuel 8:2), had remained tributary to the kingdom of the ten tribes after the division of the kingdom. but when Israel was defeated by the Syrians at Ramoth in the time of Ahab, they took advantage of this defeat and the weakening of the Israelitish power in the country to the east of the Jordan to shake off the yoke of the Israelites, and very soon afterwards attempted an invasion of the kingdom of Judah, in alliance with the Edomite and other tribes of the desert, which terminated, however, in a great defeat, though it contributed to the maintenance of their independence. For further remarks, see at 2-Kings 3:4.

Moab - This had been subdued by David, as Edom was; and upon the division of his kingdom, Moab was adjoined to that of Israel, and Edom to that of Judah, each to that kingdom upon which it bordered. But when the kingdoms of Israel and Judah were weak and forsaken by God, they took that opportunity to revolt from them; Moab here, and Edom a little after.