John Gill's Bible Commentary Ver. 5. But it came to pass, when Ahab was dead, that the king of Moab rebelled against the king of Israel .] Who then was Ahaziah; but either through the pusillanimity of his temper, or the sickness that attended him, or the shortness of his reign, he took no steps to the reduction of him, or to oblige him to pay his tribute, which he neglected to do, and is meant by his rebellion.
Matthew Henry Commentary
Verses 1-5 - Jehoram took warning by God's judgment, and put away the image of Baal yet he maintained the worship of the calves. Those do not truly repen or reform, who only part with the sins they lose by, but continue to love the sins that they think to gain by.
Original Hebrew ויהי1961 כמות4194 אחאב256 ויפשׁע6586 מלך4428 מואב4124 במלך4428 ישׂראל׃3478