Reference for Eruvin 201:7
תני ר' חייא דלת אלמנה הנגררת אין נועלין בה היכי דמי דלת אלמנה איכא דאמרי דחד שיפא ואיכא דאמרי דלית ליה גשמה
may be laid out from the top downwards.<span class="x" onmousemove="('comment',' The upper logs or chips being held up in the air while the lower ones are inserted and arranged beneath them.');"><sup>21</sup></span> but it is forbidden to build it up from the bottom upwards,<span class="x" onmousemove="('comment',' Placing, for instance, two chips at the bottom and another two crosswise above them; since this has the appearance of building which is forbidden on a festival day as on the Sabbath.');"><sup>22</sup></span> and the same applies to an egg,<span class="x" onmousemove="('comment',' That is to be roasted. The egg must be held up while the wood is laid out under it (cf. prev. two notes) .');"><sup>23</sup></span> a pot,<span class="x" onmousemove="('comment',' Supported on two casks. Cf. Bezah 32b.');"><sup>24</sup></span> a bed<span class="x" onmousemove="('comment',' The center cloth must be held up while the frame is pushed under it (cf. prev. notes) .');"><sup>25</sup></span>