Reference for Menachot 189:3
איבעיא להו לחם הפנים נפסל במסעות או אינו נפסל במסעות רבי יוחנן ורבי יהושע בן לוי חד אמר נפסל וחד אמר אינו נפסל
For it was taught There were four golden props there which put forth branches on top like brackets, and these supported the cakes which resembled a ship's keel. The question was raised: Was the Shewbread rendered invalid on the journeys,<span class="x" onmousemove="('comment',' When the camp was about to break up and Israel was ordered to set forth on their journeys, the Tabernacle was dismantled Fig. 2 and its parts carried by the Levites. Now the only offering that was continually in progress a=props; b=cakes; c=rods. in the Tabernacle was the Shewbread, for every Sabbath fresh bread was set upon the table and the old bread which had stood for seven days on the table was removed and consumed by the priests. The question here is, whether the Shewbread was immediately rendered invalid on the dismantling of the Tabernacle or not.');"><sup>4</sup></span>