Niddah 109
אמר רב אשי
as she conveys uncleanness to objects under a heavy stone<span class="x" onmousemove="('comment',' On which she sits; though her weight can hardly exercise any tangible pressure on the objects (Tosaf.). Lit., 'a stone (used) for closing (a pit)'. V. Shab., Sonc. ed., p. 394, n. 2. ');"><sup>2</sup></span>
אמר קרא (ויקרא טו, י) והנושא אותם אותם מיעוטא הוא
so does her blood also convey uncleanness to objects under a heavy stone? — R. Ashi replied: Scripture said, And he that beareth those things,<span class="x" onmousemove="('comment',' Lev. XV, 10, dealing with the couch of a zab which (as explained in Torath Kohanim) when carried on a heavy stone conveys uncleanness to objects under the stone. ');"><sup>3</sup></span>
התם דאקמח והוי עפרא
crumbles.<span class="x" onmousemove="('comment',' While according to Resh Lakish it would still be unclean since it emanates from a corpse, it would lose its uncleanness according to R. Johanan since it is not one solid piece like a bone. ');"><sup>14</sup></span>
אמר רב אדא בר אהבה
Every part of a corpse conveys uncleanness except the teeth, the hair and the nails, but while they are attached [to the corpse] they are all unclean?<span class="x" onmousemove="('comment',' Oh. III, 3. Now teeth are on a par with bones and yet it was stated that when detached from the corpse they are clean (cf. prev. n.). ');"><sup>17</sup></span>
ומה טעם אמרו טמא גזרה שמא יעשה אדם עור אביו ואמו שטיחין
— Surely in connection with this ruling it was stated: 'Ulla said, 'Pentateuchally the skin of a human being is clean, and what is the reason why they ruled it to be unclean? It is a preventive measure against the possibility that a person might use the skins of his father and mother as spreads for an ass.'
אבל הזוב
And even R. Meir declares it to be fit only because its flesh hardens and the animal recovers its health but it does not, as a matter of fact, grow again,<span class="x" onmousemove="('comment',' The skin should consequently have been unclean. ');"><sup>36</sup></span>
זוב מנלן
and yet did not 'Ulla state, 'Pentateuchally the skin of a man is clean'? — When 'Ulla's statement was made it had reference to the final clause<span class="x" onmousemove="('comment',' Of the Mishnah, beginning 'In the case of the following their skins etc.' cited supra. ');"><sup>37</sup></span>
(ויקרא טו, ב) זובו טמא לימד על הזוב שהוא טמא
if they were dressed or trodden upon sufficiently to render them fit for dressing, are clean<span class="x" onmousemove="('comment',' Since they have lost all resemblance to flesh. ');"><sup>39</sup></span>
שעיר המשתלח יוכיח שגורם טומאה לאחרים והוא עצמו טהור
And it was in connection with this ruling that 'Ulla stated, 'Pentateuchally the human skin is clean if it had been dressed; and what is the reason why they ruled it to be unclean? It is a preventive measure against the possibility that a person might use the skins of his father and mother as spreads'. But does not flesh grow again and yet it is unclean? — Mar son of R. Ashi replied: The place of missing flesh becomes a scar.<span class="x" onmousemove="('comment',' Sc. it does not grow again to its original shape as is the case with hair or nails. ');"><sup>41</sup></span>
במגע לא איצטריך קרא דלא גרע משכבת זרע
The case of the scapegoat proves the contrary, since it causes uncleanness to others<span class="x" onmousemove="('comment',' The man who carries it away (cf. Lev. XVI, 26). ');"><sup>48</sup></span> while it is itself clean. You also should not, therefore, be surprised in this case<span class="x" onmousemove="('comment',' Zibah. ');"><sup>49</sup></span> where, though the issue carries uncleanness to others,<span class="x" onmousemove="('comment',' Sc. the zab. ');"><sup>46</sup></span> it is itself<span class="x" onmousemove="('comment',' Zibah. ');"><sup>49</sup></span> clean. Hence it was specifically stated, 'His issue is unclean'<span class="x" onmousemove="('comment',' Lev. XV, 2. ');"><sup>43</sup></span> teaching thereby that the issue is unclean. But might it not be suggested that this<span class="x" onmousemove="('comment',' The conveyance of uncleanness by an issue. ');"><sup>50</sup></span> applies only to contact [uncleanness] but not to carriage, this being a case similar to that of a dead creeping thing?<span class="x" onmousemove="('comment',' Which also conveys uncleanness by means of contact but not by carriage. ');"><sup>51</sup></span> — R. Bibi b. Abaye replied: There was no need for a Scriptural text as far as contact is concerned, since it<span class="x" onmousemove="('comment',' The conveyance of uncleanness by an issue. ');"><sup>50</sup></span> is not inferior<span class="x" onmousemove="('comment',' In its uncleanness. ');"><sup>52</sup></span> to semen,