16 In the fifth year of Joram, the son of Ahab, king of Israel, Jehoram, the son of Jehoshaphat, king of Judah, became king. 17 He was thirty-two years old when he became king; and he was ruling in Jerusalem for eight years. 18 He went in the ways of the kings of Israel, as the family of Ahab did: for the daughter of Ahab was his wife; and he did evil in the eyes of the Lord. 19 But it was not the Lord's purpose to send destruction on Judah, because of David his servant, to whom he had given his word that he would have a light for ever. 20 In his time, Edom made themselves free from the rule of Judah, and took a king for themselves. 21 Then Joram went over to Zair, with all his war-carriages; ... made an attack by night on the Edomites, whose forces were all round him, ... the captains of the war-carriages; and the people went in flight to their tents. 22 So Edom made themselves free from the rule of Judah to this day. And at the same time, Libnah made itself free. 23 Now the rest of the acts of Joram, and all he did, are they not recorded in the book of the history of the kings of Judah?
Matthew Henry's Commentary on 2 Kings 8:16-23
Commentary on 2 Kings 8:16-24
(Read 2 Kings 8:16-24)
A general idea is given of Jehoram's badness. His father, no doubt, had him taught the true knowledge of the Lord, but did ill to marry him to the daughter of Ahab; no good could come of union with an idolatrous family.