Reference for Bava Batra 40:15
<big><strong>מתני׳</strong></big> חנות שבחצר יכול למחות בידו ולומר לו איני יכול לישן מקול הנכנסין ומקול היוצאין אבל עושה כלים יוצא ומוכר בתוך השוק ואינו יכול למחות בידו ולומר לו איני יכול לישן לא מקול הפטיש ולא מקול הריחים ולא מקול התינוקות:
under the storehouse. what is the ruling?]<span class="x" onmousemove="('comment',' This apparently means that a bakery is opened in the exedra under the storeroom, as it is difficult to imagine an exedra being actually built under an upper storey. The whole clause is suspect, and is omitted in some editions. V. BaH and R. Gershom; H.M. 255. ');"><sup>23</sup></span> If he builds a room on the roof,<span class="x" onmousemove="('comment',' Lit., an upperstorey on top of his house'. Such places were normally used for storerooms. [Maimonides (Yad. Shekenim, IX, 13) renders: 'If the owner of the bakery made an extra floor within his shop' so that the upper part could be used as a storeroom.] ');"><sup>24</sup></span>