2 Kings 8:25

In the twelfth year of Joram the son of Ahab, king of Israel, Ahaziah the son of Joram became king of Judah.

2 Kings 9:29

In the eleventh year of Joram the son of Ahab, Ahaziah had become king over Judah.

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.

2 Chronicles 21:20-6

He was thirty-two years old when he began to reign, and he reigned eight years in Jerusalem. And he departed with no [one's] regret. And they buried him in the city of David, but not in the burial sites of the kings.

Treasury of Scripture Knowledge

Summary

In the twelfth year of Joram the son of Ahab king of Israel did Ahaziah the son of Jehoram king of Judah begin to reign.

Bible References

General references

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.
2 Kings 9:29
In the eleventh year of Joram the son of Ahab, Ahaziah had become king over Judah.
2 Chronicles 21:20
He was thirty-two years old when he began to reign, and he reigned eight years in Jerusalem. And he departed with no [one's] regret. And they buried him in the city of David, but not in the burial sites of the kings.