1 Kings 15:13
13. also Maachah his mother, even her he removed from being queen—The sultana, or queen dowager, was not necessarily the king's natural mother (see 1Ki 2:19), nor was Maachah. Her title, and the privileges connected with that honor and dignity which gave her precedency among the ladies of the royal family, and great influence in the kingdom, were taken away. She was degraded for her idolatry.
because she had made an idol in a grove—A very obscene figure, and the grove was devoted to the grossest licentiousness. His plans of religious reformation, however, were not completely carried through, "the high places were not removed" (see 1Ki 3:2). The suppression of this private worship on natural or artificial hills, though a forbidden service after the temple had been declared the exclusive place of worship, the most pious king's laws were not able to accomplish. 2 Chronicles 15:16
2 Chronicles 30:14
14. they arose and took away the altars that were in Jerusalem—As a necessary preparation for the right observance of the approaching solemnity, the removal of the altars, which Ahaz had erected in the city, was resolved upon (2Ch 28:24); for, as the people of God, the Hebrews were bound to extirpate all traces of idolatry; and it was a happy sign and pledge of the influence of the Spirit pervading the minds of the people when they voluntarily undertook this important preliminary work.