II Chronicles 33:17 Midrash

אֲבָל֙ ע֣וֹד הָעָ֔ם זֹבְחִ֖ים בַּבָּמ֑וֹת רַ֖ק לַיהוָ֥ה אֱלֹהֵיהֶֽם׃

Nevertheless the people did sacrifice still in the high places, but only unto the LORD their God. .

Read midrashic interpretation of II Chronicles 33:17: and classical rabbinic exegesis.