ג <big><strong>מתני׳</strong></big> נוהג בטהורה ואינו נוהג בטמאה רבי יהודה אומר אף בטמאה אמר ר' יהודה והלא מבני יעקב נאסר גיד הנשה ועדיין בהמה טמאה מותרת להן אמרו לו בסיני נאמר אלא שנכתב במקומו:
3 and wherever one kind is mixed with a like and also with a different kind you must disregard the like kind as if it were not present, and if the different kind is more [than the forbidden substance] it will neutralize it.<span class="x" onmousemove="('comment',' If then the first permitted piece absorbed the flavour of the forbidden piece, although we may disregard all the other pieces in the pot as being of like kind, we must nevertheless be satisfied, in order that the mixture be permitted, that the broth contains sixty times as much as the forbidden piece plus the first permitted piece, which, as we have seen, is regarded as the nebelah itself.');"><sup>2</sup></span> <big><b>MISHNAH: </b></big>IT<span class="x" onmousemove="('comment',' The prohibition of the sciatic nerve.');"><sup>3</sup></span> APPLIES TO CLEAN ANIMALS BUT NOT TO UNCLEAN.<span class="x" onmousemove="('comment',' So that if a person were to eat the sciatic nerve of an unclean animal he would not incur guilt on account of the nerve, though he would be liable on account of eating meat of an unclean animal (provided, of course, it is held that nerves are considered as meat) .');"><sup>4</sup></span> R'JUDAH SAYS, EVEN TO UNCLEAN ANIMALS. R'JUDAH ARGUED, WAS NOT THE SCIATIC NERVE PROHIBITED FROM THE TIME OF THE SONS OF JACOB, AND AT THAT TIME UNCLEAN ANIMALS WERE STILL PERMITTED TO THEM?<span class="x" onmousemove="('comment',' The sciatic nerve when first prohibited (cf. Gen. XXXII, 33) applied to all animals, clean as well as unclean, for in the patriarchal epoch there was no distinction between the clean and unclean, all were permitted. And the prohibition as it was then continued in force even subsequent to the giving of the Torah at Sinai when the distinction was made between clean and unclean beasts.');"><sup>5</sup></span> THEY REPLIED, THIS LAW WAS ORDAINED AT SINAI BUT WAS WRITTEN IN ITS PROPER PLACE.<span class="x" onmousemove="('comment',' The prohibition was first promulgated at Sinai but was merely recorded in the Torah in connection with the incident of Jacob's strife with the angel (Gen. XXXII, 25ff) which provided the reason for the subsequent prohibition.');"><sup>6</sup></span> <big><b>GEMARA: </b></big>Is R'Judah of the opinion that a prohibition can be superimposed upon an existing prohibition?<span class="x" onmousemove="('comment',' For R. Judah states in the Mishnah that it applies EVEN TO UNCLEAN ANIMALS, by which he no doubt meant to imply that he who eats the nerve of an unclean animal incurs guilt on two counts, viz., for eating the sciatic nerve and for eating of an unclean animal.');"><sup>7</sup></span>