רַחֲצוּ֙ הִזַּכּ֔וּ הָסִ֛ירוּ רֹ֥עַ מַעַלְלֵיכֶ֖ם מִנֶּ֣גֶד עֵינָ֑י חִדְל֖וּ הָרֵֽעַ׃
Wash you, make you clean, Put away the evil of your doings From before Mine eyes, Cease to do evil;
Read kabbalistic (mystical) interpretation of Isaiah 1:16: and classical mystical sources.