Reference for Eruvin 192:16
דתניא המוצא תפילין מכניסן זוג זוג אחד האיש ואחד האשה
we have leant: THIS APPLIES TO OLD ONES BUT IN THE CASE OF NEW ONES<span class="x" onmousemove="('comment',' Since they may be presumed to be mere amulets.');"><sup>31</sup></span> HE IS EXEMPT!<span class="x" onmousemove="('comment',' Sc. he must not carry them on the Sabbath; Which shows that, where the infringement of a law is to be provided against, even a possibility that involves extra trouble is taken into consideration. Why then is the possibility of tying the threads together ruled out in the case of zizith?');"><sup>32</sup></span> R'ZERA said to his son Ahabah, go out and teach them:<span class="x" onmousemove="('comment',' The Rabbis who objected to R. Eleazar's ruling. What follows is a Baraitha which is (a) more authoritative and (b) contains both the ruling and its reason.');"><sup>33</sup></span> If a man found blue wool in the street, it is unfit<span class="x" onmousemove="('comment',' For zizith.');"><sup>34</sup></span> if it was in the shape of straps,<span class="x" onmousemove="('comment',' V. supra p. 667, n. 10.');"><sup>35</sup></span> but if it was in the shape of cut threads it is fit<span class="x" onmousemove="('comment',' For zizith.');"><sup>34</sup></span> because no one would take unnecessary trouble.<span class="x" onmousemove="('comment',' To tie them together and then to use them instead of one long thread.');"><sup>36</sup></span> 'And', retorted Raba, 'because Ahabah the son of R'Zera taught it has he, forsooth, hung jewels<span class="x" onmousemove="('comment',' Lit., ('precious) stones'.');"><sup>37</sup></span> upon it?<span class="x" onmousemove="('comment',' Sc. his citation is open to the same objection as the ruling of R. Eleazar.');"><sup>38</sup></span> Have we not in fact learnt: THIS APPLIES TO OLD ONES BUT IN THE CASE OF NEW ONES<span class="x" onmousemove="('comment',' Since they may be presumed to be mere amulets.');"><sup>39</sup></span> HE IS EXEMPT? '<span class="x" onmousemove="('comment',' V. supra n. 2.');"><sup>40</sup></span> The fact, however, is, explained Raba, that the question whether one does, or does not take unnecessary trouble is a point at issue between Tannas. For it was taught: If tefillin are found<span class="x" onmousemove="('comment',' On the Sabbath.');"><sup>41</sup></span> they are to be brought in, one pair at a time, irrespective of whether the person who brings them is a man or a woman