Israel declines during Jehu’s reign
Israel lost territory throughout Jehu’s reign to Hazael king of Syria.
Key passages
2 Ki 10:32–33

In those days, Yahweh began to reduce Israel, so Hazael defeated them in every territory of Israel, from the Jordan eastward: all of the land of Gilead, the Gadites, the Reubenites, and the Manassites, from Aroer which is on the Wadi Arnon and Gilead and Bashan.

See also
Am 1:3;