Charles Ellicott Commentary 2 Kings 3:5

"But it came to pass, when Ahab was dead, that the king of Moab rebelled against the king of Israel." — 2 Kings 3:5 (ASV)

But. — And.

When. —So some manuscripts. The ordinary text has, “about the time of Ahab’s death” (ke for be).

Rebelled — i.e., refused payment of the annual tribute.