Now the rest of the acts of Ahaziah which he did, are they not written in the book of the chronicles of the kings of Israel?
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Ephrem The Syrian
After the death of Ahaziah, since he had no children who could inherit the kingdom, his brother Jehoram became king. This did not occur because the Law prescribed anything of the sort, but because this was the custom of their neighbors, which the children of Israel had observed by now for many years. But God gives another rule for the kingdom of the children of Judah: he binds them to the family of David, and it is in this manner that the kingship was constantly transmitted from the father to the son or the next of kin—but they refused this succession only once, at the time of Jechonias, who became king after Zedekiah, brother of his father, because Jechonias was deported to Babel and Zedekiah was forced to take his place and stop the fall of the monarchy. - "On the Second Book of Kings 1.15"