7. Of God. This statement is not found in Kings. Chronicles explains how the working out of divine providence was involved in the death of Ahaziah. The king’s untimely death was interpreted as a judgment upon him for his idolatry. Ahaziah’s visit to Jehoram (or Joram) of Israel came at the exact moment of Jehu’s revolt, whence it happened that Joram, Jezebel, and Ahaziah all met their doom.
Son of Nimshi. That is, the grandson of Nimshi. Jehu was the son of Jehoshaphat, who was the son of Nimshi (2 Kings 9:2. On the usage of “son” for “grandson” see on 1 Chron. 2:7).
Anointed to cut off. Jehu was appointed to execute civil penalty upon the house of Ahab (1 Kings 19:16; 2 Kings 9:1-10).