וַיֹּצֵ֣א אֶת־הָאֲשֵׁרָה֩ מִבֵּ֨ית יְהוָ֜ה מִח֤וּץ לִירוּשָׁלִַ֙ם֙ אֶל־נַ֣חַל קִדְר֔וֹן וַיִּשְׂרֹ֥ף אֹתָ֛הּ בְּנַ֥חַל קִדְר֖וֹן וַיָּ֣דֶק לְעָפָ֑ר וַיַּשְׁלֵךְ֙ אֶת־עֲפָרָ֔הּ עַל־קֶ֖בֶר בְּנֵ֥י הָעָֽם׃
And he brought out the Asherah from the house of the LORD, without Jerusalem, unto the brook Kidron, and burned it at the brook Kidron, and stamped it small to powder, and cast the powder thereof upon the graves of the common people.
Read Kabbalistic (mystical) interpretations of II Kings 23:6: Zohar and classical Jewish mystical sources, free online.