Midrash sur Le Lévitique 16:30
כִּֽי־בַיּ֥וֹם הַזֶּ֛ה יְכַפֵּ֥ר עֲלֵיכֶ֖ם לְטַהֵ֣ר אֶתְכֶ֑ם מִכֹּל֙ חַטֹּ֣אתֵיכֶ֔ם לִפְנֵ֥י יְהוָ֖ה תִּטְהָֽרוּ׃
Car en ce jour, on fera propitiation sur vous afin de vous purifier; vous serez purs de tous vos péchés devant l’Éternel.
Sifra
1) (Vayikra 16:30) ("For on this day He shall atone for you to cleanse you of all of your sins; before the L–rd you shall be clean.") "For on this day He shall atone for you": by the offerings. And whence is it derived that even without offerings and without the he-goat, the day (itself) atones? From "For on this day He shall atone." For transgressions between man and G d Yom Kippur atones; for transgressions between man and his neighbor Yom Kippur does not atone until he conciliates his neighbor.
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Sifra
2) Thus did R. Elazar b. Azaryah expound: "Of all of your sins before the L–rd you shall be clean": For things between yourself and G d you are pardoned. For things between yourself and your neighbor you are not pardoned until you conciliate your neighbor.
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Sifra
3) And whence is it derived that eating, drinking, bathing, anointment, shodding, and cohabitation are forbidden on Yom Kippur? From "shabbaton shvuth." I might then think that all of these are forbidden on the Sabbath of creation (i.e., an ordinary Sabbath). It is, therefore, written (Vayikra 16:31) "Sabbath shabbaton is it" (Yom Kippur). It is forbidden in all of them, but not the Sabbath of creation.
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