Reference for Yevamot 159:5
לחד אבר חיישינן לכוליה גופא לא חיישינן:
three times in eighty days'!<span class="x" onmousemove="('comment',' At the beginning, middle and end of the period. Only where the blemish remained for the full eighty days is it regarded as permanent. If no examination was made in the middle of the period mentioned, the blemish cannot be deemed to be a permanent since it is possible that it had disappeared for some time and reappeared again V. Bek. 38b. Why, then, is the middle period disregarded in the case of the saris? ');"><sup>11</sup></span> — Precautions are to be taken in respect of one limb;<span class="x" onmousemove="('comment',' The eye, for instance, which was the limb affected in the case cited. ');"><sup>12</sup></span> in respect of the entire body<span class="x" onmousemove="('comment',' The impotency of the saris is an affliction affecting his body as a whole. ');"><sup>13</sup></span>