יז ת"ש דתניא כמה היא שרייתן בפושרין יהודה בן נקוסא אומר מעת לעת תחילתו אף על פי שאין סופו רשב"ג אומר צריכין שיהו פושרין מעת לעת
17 So it was also taught: R. Jose ruled, The flesh of a corpse that is dry and, on being soaked, cannot return to its original condition is clean in so far only as not to convey uncleanness if it is of the bulk of an olive but it is subject to the uncleanness of corpse-mould.<span class="x" onmousemove="('comment',' Sc. a ladleful of it conveys uncleanness by means of touch, carriage and overshadowing. ');"><sup>42</sup></span> <b><i>MISHNAH</i></b>. IF A DEAD CREEPING THING WAS FOUND IN AN ALLEY IT CAUSES UNCLEANNESS RETROSPECTIVELY TO SUCH TIME AS ONE CAN TESTIFY, 'I EXAMINED THIS ALLEY AND THERE WAS NO CREEPING THING IN IT', OR TO SUCH TIME AS IT WAS LAST SWEPT. SO ALSO A BLOODSTAIN, IF IT WAS FOUND ON A SHIRT, CAUSES UNCLEANNESS RETROSPECTIVELY TO SUCH TIME AS ONE CAN TESTIFY, 'I EXAMINED THIS SHIRT AND THERE WAS NO STAIN ON IT' OR TO SUCH TIME AS IT WAS LAST WASHED. AND IT<span class="x" onmousemove="('comment',' The dead creeping thing as well as the bloodstain. ');"><sup>43</sup></span> CONVEYS UNCLEANNESS<span class="x" onmousemove="('comment',' RETROSPECTIVELY to the times indicated. ');"><sup>44</sup></span> IRRESPECTIVE OF WHETHER IT IS WET OR DRY.<span class="x" onmousemove="('comment',' When discovered. ');"><sup>45</sup></span> R. SIMEON RULED: IF IT IS DRY<span class="x" onmousemove="('comment',' When discovered. ');"><sup>45</sup></span> IT CAUSES UNCLEANNESS RETROSPECTIVELY,<span class="x" onmousemove="('comment',' To the times previously indicated, since it is possible that the creeping thing or stain may have been there soon after the alley had been swept or the shirt washed. ');"><sup>46</sup></span>