Reference for Eruvin 44:7

ואפי' עולין לו בחבל א"ל אין ואפילו במעלות בית מרון א"ל אין

where the use [of the road] is quite easy, the Rabbis ruled that the public do not impair the validity of the enclosure, how much more is that the case here<span class="x" onmousemove="('comment',' In the case of a mound.');">¹⁷</span> where the use [of the road] is not easy. The question arises only according to R'Judah.

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