John Gill Commentary 2 Kings 8:22

"So Edom revolted from under the hand of Judah unto this day. Then did Libnah revolt at the same time." — 2 Kings 8:22 (ASV)

Yet Edom revolted from under the hand of Judah unto this day ,
&c.] Joram not pursuing the enemy, and taking the advantage of the victory, but returning to his own land, the reason of which follows:

then Libnah revolted at the same time ;
a considerable city in his own kingdom, a Levitical one; this revolt was occasioned, perhaps, by his idolatrous practices, and which he compelled his subjects to; of this city, see (Joshua 10:29) (21:13) .