וְעָשָׂ֤ה הַכֹּהֵן֙ אֶת־הָאֶחָ֣ד חַטָּ֔את וְאֶת־הָאֶחָ֖ד עֹלָ֑ה וְכִפֶּ֨ר עָלֶ֤יהָ הַכֹּהֵן֙ לִפְנֵ֣י יְהוָ֔ה מִזּ֖וֹב טֻמְאָתָֽהּ׃
And the priest shall offer the one for a sin-offering, and the other for a burnt-offering; and the priest shall make atonement for her before the LORD for the issue of her uncleanness.
Read kabbalistic (mystical) interpretation of Leviticus 15:30: and classical mystical sources.