He also removed his grandmother Maacah from her position as queen mother because she had made a detestable Asherah pole. Asa chopped down the pole and burned it in the Kidron Valley.
Jewish Publication Society of America Version (JPS1917) - 1 Kings 15:13 >And also Maacah his mother he removed from being queen, because she had made an abominable image for an Asherah; and Asa cut down her image, and burnt it at the brook Kidron.