Reference for Keritot 13:37

מבעט נמי מכפר עליה יום הכיפורים

You can rightly say that such is the case of sin- and guilt-offerings, since they do not atone for wilful sins as they do for those in error; will you apply the same to the Day of Atonement which atones alike for wilful sins as well as for those in error?

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