1 Kings 22:51

Ahaziah, &c. — Ahaziah was made king by his father, and reigned in conjunction with him a year or two before Ahab's death, and as long after it; even as Jehoram the son of Jehoshaphat was made king by his father in his life — time, which possibly was done in compliance with Ahab's desire upon marriage of his daughter to Jehoshaphat's son; and it may be Ahab, to induce him to do so, give him an example of it, and made his son his partner in the kingdom.