2 Kings 10:36

And the period that Jehu reigned over Israel in Samaria was twenty-eight years.

Surrounding context

10:35 So Jehu rested with his fathers, and they buried him in Samaria. Then Jehoahaz his son reigned in his place.

10:36 And the period that Jehu reigned over Israel in Samaria was twenty-eight years.

Translation and sources