2 Kings 1:17

So he died, according to the word of Yahweh which Elijah had spoken, and Joram became king in his place in the second year of Joram the son of Jehoshaphat, the king of Judah, because he had no son.

2 Kings 3:1

Now Joram the son of Ahab had become king over Israel in Samaria in the eighteenth year of Jehoshaphat king of Judah. He reigned twelve years

1 Kings 22:51

Ahaziah son of Ahab became king over Israel in Samaria in the seventeenth year of Jehoshaphat king of Judah, and he reigned over Israel two years.

2 Kings 8:16-17

Now in the fifth year of Joram son of Ahab, king of Israel, and Jehoshaphat king of Judah, Joram son of Jehoshaphat became the king of Judah.

Treasury of Scripture Knowledge

Summary

So he died according to the word of the LORD which Elijah had spoken. And Jehoram reigned in his stead in the second year of Jehoram the son of Jehoshaphat king of Judah; because he had no son.

Bible References

In the second

2 Kings 3:1
Now Joram the son of Ahab had become king over Israel in Samaria in the eighteenth year of Jehoshaphat king of Judah. He reigned twelve years
2 Kings 8:16
Now in the fifth year of Joram son of Ahab, king of Israel, and Jehoshaphat king of Judah, Joram son of Jehoshaphat became the king of Judah.
1 Kings 22:51
Ahaziah son of Ahab became king over Israel in Samaria in the seventeenth year of Jehoshaphat king of Judah, and he reigned over Israel two years.