כַּאֲשֶׁ֥ר עָשָׂ֖ה בַּיּ֣וֹם הַזֶּ֑ה צִוָּ֧ה יְהוָ֛ה לַעֲשֹׂ֖ת לְכַפֵּ֥ר עֲלֵיכֶֽם׃
As hath been done this day, so the LORD hath commanded to do, to make atonement for you.
Read kabbalistic (mystical) interpretation of Leviticus 8:34: and classical mystical sources.