Reference for Eruvin 167:13
דיקא נמי דקתני דומיא דסלע ש"מ
A textual deduction leads to the same conclusion: Since it has been put on a par<span class="x" onmousemove="('comment',' Lit., since it was taught similarly'.');"><sup>26</sup></span> with ROCK.<span class="x" onmousemove="('comment',' Which cannot be reduced on the Sabbath by mere use. Both standing in juxtaposition they must be assumed to be on a par.');"><sup>27</sup></span> This is conclusive.
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