21 Jehoram responded by taking his army of chariots to Zair. Edom surrounded him, but in the middle of the night he and his charioteers broke through the lines and hit Edom hard. But his infantry deserted him.

Matthew Henry's Commentary on 2 Kings 8:21

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.