3:21ג׳:כ״א
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כתנות עור. יֵשׁ דִּבְרֵי אַגָּדָה אוֹמְרִים חֲלָקִים כְּצִּפֹּרֶן הָיוּ מְדֻבָּקִים עַל עוֹרָן וְיֵ"אֹ דָּבָר הַבָּא מִן הָעוֹר, כְּגוֹן צֶמֶר הָאַרְנָבִים שֶׁהוּא רַךְ וְחָם וְעָשָׂה לָהֶם כֻּתֳּנוֹת מִמֶּנּוּ:

כתנות עור GARMENTS FOR THE SKIN — There are Agadoth which say that they were smooth as fingernails, cleaving to their skin; whereas some say that they were made of material that comes from skin, as for example, the hair of hares which is soft and warm, and of this He made garments for them (Genesis Rabbah 20:12).