Matthew Henry on 2 Kings 3:1-5
Jehoram, the son of Ahab, and brother of Ahaziah, is here upon the throne of Israel; and, though he was but a bad man, yet two commendable things are here recorded of him: -
I. That he removed his father's idols. He did evil in many things, but not like his father Ahab or his mother Jezebel, Kg2 3:2. Bad he was, but not so bad, so overmuch wicked, as Solomon speaks, Ecc 7:17. Perhaps Jehoshaphat, though by his alliance with the house of Ahab he made his own family worse, did something towards making Ahab's better. Jehoram saw his father and brother cut off for worshipping Baal, and wisely took warning by God's judgments on them, and put away the image of Baal, resolving to worship the God o…
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He put away the image of Baal - He abolished his worship; but he continued that of the calves at Dan and Beth-el.
John Gill on 2 Kings 3:2
And he wrought evil in the sight of the Lord,.... Was guilty of idolatry:
but not like his father, and like his mother; his father Ahab, and his mother Jezebel:
for he put away the image of Baal that his father had made; he did not destroy it, only removed it from the temple of Baal where it was set, that it might not be worshipped, at least publicly, see 1 Kings 16:31 this he did, either moved to it by his own conscience, observing the sudden deaths of his father and brother, which he might suppose was for their idolatry; or in order to obtain success in his war with Moab he was entering into; or being instigated by Jehoshaphat to do it, or otherwise he might refuse to join him.
Tyndale Open Study Notes on 2 Kings 3:2
Ahab apparently erected the sacred pillar (or stela) of Baal when instituting Baal worship (see 1 Kgs 16:32-33). Similar stones were also erected to pagan deities in Judah (1 Kgs 14:23); such pillars were later purged by Jehu (2 Kgs 10:26-27) and Josiah (23:13-15).
Rashi on 2 Kings 3:2