Melachim Bais 1:17

17 So he died according to the Devar Hashem which Eliyahu had spoken. And Yehoram [Yoram of Israel] reigned in his place in the second year of Yehoram [Yoram of Yehudah] ben Yehoshaphat Melech Yehudah; because bno he had not.

Melachim Bais 1:17 Meaning and Commentary

2 Kings 1:17

So he died, according to the word of the Lord which Elijah had
spoken
How long or how soon after this is not said; however, he died of the sickness, and on the bed to which he went up, as he said:

and Jehoram reigned in his stead:
who was another son of Ahab, and brother of Ahaziah, ( 2 Kings 3:1 ) , in the second year of Jehoram the son of Jehoshaphat king of Judah; but as he must begin his reign in the nineteenth, or in the latter end of the eighteenth year of Jehoshaphat, see ( 1 Kings 22:51 ) ( 2 Kings 3:1 ) and Jehoshaphat reigned in all twenty five years, ( 1 Kings 22:42 ) , he must live and reign after this six or seven years; this therefore is to be reconciled by observing, that this son of Jehoshaphat was made viceroy, or was taken into partnership in the throne by his father when he went with Ahab to Ramothgilead; and it was in the second year of this his reign with his father that the other Jehoram began his:

because he had no son;
that is, Ahaziah, wherefore his brother reigned in his stead.

Melachim Bais 1:17 In-Context

15 And the Malach Hashem said unto Eliyahu, Go down with him; be not afraid of him. And he got up, and went down with him unto HaMelech.

16 And he said unto him, Thus saith Hashem, Forasmuch as thou hast sent malachim to inquire of Ba’al Zevuv elohei Ekron, is it because there is no Elohim in Yisroel to inquire of His Davar? Therefore thou shalt not get down from that mittah (bed, couch) on which thou art gone up, but shalt surely die.

17 So he died according to the Devar Hashem which Eliyahu had spoken. And Yehoram [Yoram of Israel] reigned in his place in the second year of Yehoram [Yoram of Yehudah] ben Yehoshaphat Melech Yehudah; because bno he had not.

18 Now the rest of the acts of Achazyahu which he did, are they not written in the Sefer Divrei HaYamim of the Melachim of Yisroel?