8 In his days Edom revolted against the rule of Judah and set up a king of their own. 9 Then Jehoram crossed over with his commanders and all his chariots. He set out by night and attacked the Edomites, who had surrounded him and his chariot commanders. 10 So Edom has been in revolt against the rule of Judah to this day. At that time Libnah also revolted against his rule, because he had forsaken the Lord, the God of his ancestors. 11 Moreover he made high places in the hill country of Judah, and led the inhabitants of Jerusalem into unfaithfulness, and made Judah go astray.

12 A letter came to him from the prophet Elijah, saying: "Thus says the Lord, the God of your father David: Because you have not walked in the ways of your father Jehoshaphat or in the ways of King Asa of Judah, 13 but have walked in the way of the kings of Israel, and have led Judah and the inhabitants of Jerusalem into unfaithfulness, as the house of Ahab led Israel into unfaithfulness, and because you also have killed your brothers, members of your father's house, who were better than yourself, 14 see, the Lord will bring a great plague on your people, your children, your wives, and all your possessions, 15 and you yourself will have a severe sickness with a disease of your bowels, until your bowels come out, day after day, because of the disease." 16 The Lord aroused against Jehoram the anger of the Philistines and of the Arabs who are near the Ethiopians. 17 They came up against Judah, invaded it, and carried away all the possessions they found that belonged to the king's house, along with his sons and his wives, so that no son was left to him except Jehoahaz, his youngest son.

Matthew Henry's Commentary on 2 Chronicles 21:8-17

Commentary on 2 Chronicles 21:1-11

(Read 2 Chronicles 21:1-11)

Jehoram hated his brethren, and slew them, for the same reason that Cain hated Abel, and slew him, because their piety condemned his impiety. In the mystery of Providence such men sometimes prosper for a time; but the Lord has righteous purposes in permitting such events, part of which may now be made out, and the rest will be seen hereafter.

Commentary on 2 Chronicles 21:12-20

(Read 2 Chronicles 21:12-20)

A warning from God was sent to Jehoram. The Spirit of prophecy might direct Elijah to prepare this writing in the foresight of Jehoram's crimes. He is plainly told that his sin should certainly ruin him. But no marvel that sinners are not frightened from sin, and to repentance, by the threatenings of misery in another world, when the certainty of misery in this world, the sinking of their estates, and the ruin of their health, will not restrain them from vicious courses. See Jehoram here stripped of all his comforts. Thus God plainly showed that the controversy was with him, and his house. He had slain all his brethren to strengthen himself; now, all his sons are slain but one. David's house must not be wholly destroyed, like those of Israel's kings, because a blessing was in it; that of the Messiah. Good men may be afflicted with diseases; but to them they are fatherly chastisements, and by the support of Divine consolations the soul may dwell at ease, even when the body lies in pain. To be sick and poor, sick and solitary, but especially to be sick and in sin, sick and under the curse of God, sick and without grace to bear it, is a most deplorable case. Wickedness and profaneness make men despicable, even in the eyes of those who have but little religion.