21:6 daughter of Ahab. This daughter of Ahab was Athaliah, the daughter of Jezebel, the Phoenician princess who introduced Baalism into Israel. Athaliah, in turn, introduced it into Judah as the wife of King Jehoram. Jehoram slew all his younger brothers upon becoming king (II Chronicles 21:4), no doubt on the instigation of Athaliah, thus opening the way for her later to usurp the crown for herself (II Chronicles 22:10, 12).

21:6 that which was evil. Athaliah, was probably even more pagan and wicked than her Phoenician mother. Her arranged marriage to Jehoshaphat’s firstborn son, which had led to Jehoshaphat’s alliance with Ahab (see note on II Chronicles 18:1) was undoubtedly behind Jehoram’s murder of his brothers, who had probably resisted Athaliah’s introduction of Baalism into Judah (note II Chronicles 21:13).