1 Kings 15:11-14
10-13. his mother's name was Maachah—She was properly his grandmother, and she is here called "the king's mother," from the post of dignity which at the beginning of his reign she possessed. Asa, as a constitutional monarch, acted like the pious David, laboring to abolish the traces and polluting practices of idolatry, and in pursuance of his impartial conduct, he did not spare delinquents even of the highest rank.
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.