8 During Jehoram's reign, Edom revolted from Judah's rule and set up their own king. 9 Jehoram responded by setting out with his officers and chariots. Edom surrounded him, but in the middle of the night he and his charioteers broke through the lines and hit Edom hard. 10 Edom continues in revolt against Judah right up to the present. Even little Libnah revolted at that time. The evidence accumulated: Since Jehoram had abandoned God, the God of his ancestors, God was abandoning him.
Matthew Henry's Commentary on 2 Chronicles 21:8-10
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.