Reference for Bava Batra 288:11
ושמואל אמר הכא ביבם עסקינן שאינו נוטל בראוי כבמוחזק
[it refers to the case] where he did specify; as It was taught: If his father sent wedding gifts [through] him,<span class="x" onmousemove="('comment',' One of his sons. ');"><sup>38</sup></span> the reciprocated gift belongs to him.<span class="x" onmousemove="('comment',' The son who acted as shoshbin. ');"><sup>39</sup></span> If his father. [however.] sent wedding gifts without specifying [which son was to take them], the reciprocated gift reverts to the common estate.<span class="x" onmousemove="('comment',' Though one of the sons had acted as the shoshbin and carried the presents. ');"><sup>40</sup></span> And Samuel explained: Here<span class="x" onmousemove="('comment',' Our Mishnah according to which the reciprocated gift reverts to the common estate. ');"><sup>41</sup></span>