In the fifth year of Joram son of Ahab king of Israel, when Jehoshaphat was king of Judah, Jehoram son of Jehoshaphat began his reign as king of Judah.
References for 2 Kings 8:16
He was thirty-two years old when he became king, and he reigned in Jerusalem eight years.
He followed the ways of the kings of Israel, as the house of Ahab had done, for he married a daughter of Ahab. He did evil in the eyes of the LORD.
References for 2 Kings 8:18