2 Kings 3:1

And Jehoram the son of Ahab began to reign over Israel in Samaria in the eighteenth year of Jehoshaphat king of Judah; and he reigned twelve years.

2 Kings 1:17

And he died according to the word of Jehovah that Elijah had spoken. And Jehoram began to reign in his stead, in the second year of Jehoram the son of Jehoshaphat king of Judah; for he had no son.

1 Kings 22:51

Ahaziah the son of Ahab began to reign over Israel in Samaria the seventeenth year of Jehoshaphat king of Judah; and he reigned two years over Israel.

2 Kings 8:16

And in the fifth year of Joram the son of Ahab, king of Israel, Jehoshaphat being then king of Judah, Jehoram the son of Jehoshaphat, king of Judah, began to reign.

Treasury of Scripture Knowledge

Summary

Now Jehoram the son of Ahab began to reign over Israel in Samaria the eighteenth year of Jehoshaphat king of Judah, and reigned twelve years.

Bible References

Jehoram

2 Kings 1:17
And he died according to the word of Jehovah that Elijah had spoken. And Jehoram began to reign in his stead, in the second year of Jehoram the son of Jehoshaphat king of Judah; for he had no son.
2 Kings 8:16
And in the fifth year of Joram the son of Ahab, king of Israel, Jehoshaphat being then king of Judah, Jehoram the son of Jehoshaphat, king of Judah, began to reign.