Reference for Bava Metzia 51:11

שמע מינה הלכה כר"ש בן אלעזר אפי' ברוב ישראל

— Said Resh Lakish on the authority of Bar Kappara: It means e.g., that he [the owner of the house] had let it as a temporary lodging to three people [simultaneously].<span class="x" onmousemove="('comment',' In addition to the tenant (so it appears to be understood by Tosaf. a.l. s.v. [H] and [H]). Therefore whichever tenant lost it would have abandoned it in despair of its being returned, in accordance with the view stated by R. Simeon b. Eleazar supra 24a: three constitute a multitude. ');">¹⁰</span>

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