Reference for Pesachim 91:3

מתקיף לה רבא מי קתני מצטרף והא חוצץ קתני אלא אמר רבא וכן להעלות טהרה לעריבה

[But] during the rest of the year, when the matter is dependent on [his] objecting, IF HE OBJECTS TO IT,<span class="x" onmousemove="('comment',' Which gives it an importance.');">⁴</span> it combines; [while] IF HE DESIRES ITS PRESERVATION, IT IS LIKE THE KNEADING-TROUGH.

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