2 Kings 1 18
The rest of what happened in Ahaziah's reign and what he did are recorded in the Book of Chronicles of the Kings of Israel.
Compare with other 3 random translations
NCV 2 Kings 1:18The other things Ahaziah did are written in the book of the history of the kings of Israel.
AMP 2 Kings 1:18Now 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?
LSV 2 Kings 1:18And the rest of the matters of Ahaziah that he did, are they not written on the scroll of the Chronicles of the Kings of Israel?