Reference for Shabbat 53:7
אמר אביי האי תנא דבי רבי ישמעאל מפיק מאידך תנא דבי ר' ישמעאל דתני דבי רבי ישמעאל בגד אין לי אלא בגד צמר ופשתים מניין לרבות צמר גמלים וצמר ארנבים נוצה של עזים והשירין והכלך והסריקין תלמוד לומר או בגד
and leprosy would be learnt from them. And the other? — Leprosy could not be derived from reptiles, because it may be refuted: as for reptiles, [the reason is] because they defile by the size of a lentil.<span class="x" onmousemove="('comment',' A piece the size of a lentil is sufficient to defile, whereas the smallest leprous eruption to defile is the size of a bean, which is larger than a lentil. ');"><sup>13</sup></span> Abaye said: This Tanna of the School of R. Ishmael rebuts another Tanna of the School of R. Ishmael. For the School of R. Ishmael taught: 'A garment': I know it only of a woollen or a linen garment: whence do I know to include camel hair,<span class="x" onmousemove="('comment',' Lit., 'wool of camels'. ');"><sup>14</sup></span>