Reference for Bava Kamma 132:16

והרי מריש דאיכא שינוי השם דמעיקרא כשורא והשתא טללא ותנן על המריש הגזול שבנאו בבירה שנוטל דמיו מפני תקנת השבים

Rabbah son of R. Hanan demurred to this, saying: This was learnt here in connection with a [dining] cover,<span class="x" onmousemove="('comment',' Since the case of the skins follows in the Mishnah that of the (dining) cover. [The dining cover (Heb. 'izba), was spread over the ground in the absence of a proper table from which to eat; cf. Rashi and Krauss, Talm. Arch., I, 376.] ');">²⁹</span> and [skins intended to be used as] a cover do not require trimming as we have learnt:<span class="x" onmousemove="('comment',' Kel. XXVI, 7. ');">³⁰</span>

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