יח א"ל רב אדא [לרב חיננא מסורא] לאו הכי הוה עובדא בדביתהו דאבא מרי ריש גלותא דאיקוט אזל ר"נ בר יצחק לפיוסה ואמרה ליה מאי איתיה השתא
18 may wash her head on a Sunday<span class="x" onmousemove="('comment',' Lit., 'on the first day of the week'. ');"><sup>30</sup></span> and perform immersion on the following Tuesday,<span class="x" onmousemove="('comment',' Sc. an interval of a day may be allowed between the washing of her head and her immersion. ');"><sup>31</sup></span> since similarly she<span class="x" onmousemove="('comment',' Whose immersion is due on a Saturday night. ');"><sup>32</sup></span> is allowed to wash her head<span class="x" onmousemove="('comment',' An act forbidden on a Saturday which is the Sabbath day. This question is asked on the view that the washing of the head may not be performed on the same night as the immersion, v. infra. ');"><sup>33</sup></span> on a Friday<span class="x" onmousemove="('comment',' Lit., 'Sabbath eve'. ');"><sup>34</sup></span> and undergo immersion on the following Saturday night.<span class="x" onmousemove="('comment',' Lit., at the goings out of the Sabbath'. As an interval of one day must inevitably be allowed in this case (cf. prev. nn.) it is also allowed where the interval is merely a matter of the woman's convenience. ');"><sup>35</sup></span> A woman may wash her head on a Sunday and undergo immersion on the following Wednesday, since similarly she<span class="x" onmousemove="('comment',' Whose immersion is due on the termination of a festival day that fell on a Sunday. ');"><sup>36</sup></span> is allowed to wash her head<span class="x" onmousemove="('comment',' An act forbidden on a festival day. ');"><sup>37</sup></span> on a Friday<span class="x" onmousemove="('comment',' Lit., 'Sabbath eve'. ');"><sup>34</sup></span> and undergo immersion in the night following a festival that occurred on a Sunday. A woman may wash her head on a Sunday and undergo immersion on the following Thursday, since similarly she may wash her head on a Friday and undergo immersion in the night following the two festival days of the New Year that happened to fall immediately after a Saturday. R. Hisda, however, stated: In all these cases<span class="x" onmousemove="('comment',' Where immersion is due on a night that followed a Sabbath or a festival day on which the washing of one's head is forbidden. ');"><sup>38</sup></span> we rule as mentioned<span class="x" onmousemove="('comment',' That an interval of a day or more is permitted between the time of the washing of the head and immersion. ');"><sup>39</sup></span> but we do not draw the inference of 'since similarly'; for where [the avoidance of an interval] is possible an interval must be avoided,<span class="x" onmousemove="('comment',' Lit., 'possible'. ');"><sup>40</sup></span> and only where this is impossible<span class="x" onmousemove="('comment',' As in the cases where the days preceding the nights of immersion are ones on which the washing of the head is forbidden. ');"><sup>41</sup></span> may an interval be allowed.<span class="x" onmousemove="('comment',' Lit., 'it is not possible'. ');"><sup>42</sup></span> R. Yemar, however, stated: We may even draw the inferences of 'since similarly'<span class="x" onmousemove="('comment',' Sc. an interval may be allowed even on account of a woman's personal convenience, since she is allowed a similar interval when the day preceding the night of her immersion is one on which it is forbidden to wash one's head. ');"><sup>43</sup></span> except in the case where a woman is permitted to wash her head on a Sunday and undergo immersion on the following Thursday, for the parallel of the night following the two festival days of the New Year that happened to fall immediately after a Saturday does not hold, since it is possible for the woman to wash her head and undergo immersion in the same night.<span class="x" onmousemove="('comment',' The one following the second festival day of the New Year. Had she been allowed to wash her head on the preceding Friday the interval between the washing and the immersion would have been too long; hence it is preferable that the washing be done in the same night as the immersion. As a long interval of three day is not allowed even in such a case, where the washing of the head on the day preceding the night of the immersion is impossible, it cannot be allowed, with much more reason, where the interval is no necessity but a matter of convenience. ');"><sup>44</sup></span> Meremar in his discourse laid down: The law is in agreement with R. Hisda<span class="x" onmousemove="('comment',' That 'we do not draw the inference of since similarly' and that, consequently, no interval for the sake of a woman's personal convenience may be allowed between the washing of her head and her immersion. ');"><sup>45</sup></span> but<span class="x" onmousemove="('comment',' Though R. Hisda allows an interval where the day preceding the immersion is one on which labour is forbidden. ');"><sup>46</sup></span> in accordance with the interpretation of R. Yemar.<span class="x" onmousemove="('comment',' Who allows the interval only in the first two cases but not in the third case where the immersion is due on the termination of the New Year festival that happened to fall on a Sunday and a Monday. ');"><sup>47</sup></span> The question was raised: May a woman wash her head at night<span class="x" onmousemove="('comment',' The night in which her immersion is due. ');"><sup>48</sup></span> and perform immersion the same night?<span class="x" onmousemove="('comment',' Is she, it is asked, likely to pay scant attention to the former on account of her hurry to get through with her immersion? ');"><sup>49</sup></span> — Mar Zutra forbids this, but R. Hinena of Sura permits it. Said R. Adda to R. Hinena of Sura:<span class="x" onmousemove="('comment',' Var. lec., R. Adda of Sura to Mar Zutra (BaH.). ');"><sup>50</sup></span> Did not the following incident<span class="x" onmousemove="('comment',' Which proves that washing the head and immersion may take place the same night. ');"><sup>51</sup></span> actually occur<span class="x" onmousemove="('comment',' Lit., 'was not thus the incident'. ');"><sup>52</sup></span> to the wife of the exilarch Abba Mari? She having had some quarrel<span class="x" onmousemove="('comment',' With her husband, as a result of which she refused to perform immersion. ');"><sup>53</sup></span> R. Nahman b. Isaac proceeded to pacify her, and when she said to him, 'What is the hurry now?<span class="x" onmousemove="('comment',' At night. ');"><sup>54</sup></span>