2 Kings 1:17
So Ahaziah died according to the word of the LORD that Elijah had spoken. Since he had no son, Jehoram succeeded him in the second year of the reign of Jehoram son of Jehoshaphat over Judah.

1 Kings 22:50
And Jehoshaphat rested with his fathers and was buried with them in the city of his father David, and his son Jehoram reigned in his place.

2 Chronicles 21:1-20
Then Jehoshaphat rested with his fathers and was buried with them in the City of David. And his son Jehoram became king in his place. . . .

began to reign.