Many years before Isaiah wrote those words, good King Asa vigorously pursued a campaign to root out immorality in Judah.
اُخْرُجُوا مِنْ وَسَطِ [بَابِلَ] ،‏ تَطَهَّرُوا يَا حَامِلِي عَتَادِ بَيْتِ يَهْوَهَ » .‏