Related for Eruvin 60:15
ולכהן בבית הפרס: דאמר רב יהודה אמר שמואל מנפח אדם בית הפרס והולך רבי יהודה בר אמי משמיה דרב יהודה אמר בית הפרס שנידש טהור:
refers] to a sick, and an old man;<span class="x" onmousemove="('comment',' In agreement with the ruling of R. Simeon b. Eleazar.');"><sup>39</sup></span> but [not to] a glutton whose habit is disregarded in the view of the average man.<span class="x" onmousemove="('comment',' Lit., his mind is abolished by the side of all man'.');"><sup>40</sup></span> [AN 'ERUB] MAY BE PREPARED] FOR A PRIEST IN A BETH PERAS; for Rab Judah stated in the name of Samuel: A man may : blow away [the earth of] a beth peras<span class="x" onmousemove="('comment',' A man walking through an area in which a grave has been ploughed, any portion of the soil of which is in consequence a possible repository of a human bone which conveys levitical uncleanness to the man who moves it with his foot, is subject to the laws of doubtful uncleanness. If the earth, however, is blown or moved away in front of him step by step he remains levitically clean since all covered bones are thus exposed and easily avoided.');"><sup>41</sup></span> and continue on his way.<span class="x" onmousemove="('comment',' In this manner a priest, who is forbidden to defile himself for the dead, can make his way to his 'erub even in such an area.');"><sup>42</sup></span>