Reference for Shabbat 128:18
תנאי היא דתניא
— Because he teaches of an old woman's [going out] with a young woman's [hair], he also teaches of a young woman's [going out] with an old woman's hair. WITH A HAIR-NET AND A WIG INTO A COURTYARD. Rab said: Whatever the Sages forbade to go out therewith into the street, one may not go out therewith into a courtyard,<span class="x" onmousemove="('comment',' Lest she forget herself and go out into the street too. ');"><sup>16</sup></span> except a hair-net and a wig. R. 'Anani b. Sason said on the authority of R. Ishmael son of R. Jose: It is all like a hair-net. We learnt: WITH A HAIR-NET AND A WIG INTO A COURTYARD. As for Rab, it is well; but according to R. 'Anani b. Sason it is a difficulty? — On whose authority does R. 'Anani b. Sason say this? On that of R. Ishmael son of R. Jose! R. Ishmael son of R. Jose is a Tanna, and can disagree.<span class="x" onmousemove="('comment',' It is axiomatic that an amora cannot disagree with a Tanna, but another Tanna of course can. The Mishnah certainly disagrees with R. 'Anani b. Sason, but it does not matter, as he is supported by another Tanna. ');"><sup>17</sup></span> Now, according to Rab, why do these differ? — Said 'Ulla, [They are permitted] lest she become repulsive to her husband.<span class="x" onmousemove="('comment',' Hence some ornaments must be permitted. ');"><sup>18</sup></span> As it was taught: And she that is sick shall be in her impurity:<span class="x" onmousemove="('comment',' Lev. XV, 33. The reference is to a menstruant. ');"><sup>19</sup></span> the early Sages<span class="x" onmousemove="('comment',' Lit., 'elders'. ');"><sup>20</sup></span> ruled: That means that she must not rouge nor paint nor adorn herself in dyed garments; until R. Akiba came and taught: If so, you make her repulsive to her husband, with the result that he will divorce her! But what [then] is taught by, 'and she that is sick shall be it, her impurity'? She shall remain in her impurity until she enters Into water.<span class="x" onmousemove="('comment',' I.e., until she has a ritual bath. ');"><sup>21</sup></span> Rab Judah said in Rab's name: Wherever the Sages forbade [aught] for appearances' sake, it is forbidden even In one's innermost chambers.<span class="x" onmousemove="('comment',' E.g., one must not lead on Sabbath a number of animals tied together, lest he be suspected of going to market with them (supra 54a). Accordingly he may not do so even in the utmost privacy. ');"><sup>22</sup></span> We learnt: Nor with a bell, even if it is plugged.<span class="x" onmousemove="('comment',' V. supra 54b Mishnah. ');"><sup>23</sup></span> And it was elsewhere taught.<span class="x" onmousemove="('comment',' Var. lec.: and it was taught thereon. ');"><sup>24</sup></span> One may plug the bell around its [the animal's] neck and saunter with it in the courtyard?<span class="x" onmousemove="('comment',' This refutes Rab, for though it may not be done publicly in the street, it may be done privately in one's courtyard. ');"><sup>25</sup></span> — It is [a controversy of] Tannaim. For it was taught: