Reference for Eruvin 44:4
בעא מיניה רחבה מרבא תל המתלקט עשרה מתוך ארבע ורבים בוקעין בו חייבין עליו משום רה"ר או אין חייבין עליו
So it was also stated: When Rabin came<span class="x" onmousemove="('comment',' From Palestine to Babylon.');"><sup>9</sup></span> he stated in the name of R'Johanan (others say: R'Abbahu stated in the name of R'Johanan) : No guilt is incurred for [the carrying of objects in] a public domain [in the case of] the ascents and descents of the Land of Israel, because they are not [as accessible] as [the domain on which] the standards<span class="x" onmousemove="('comment',' Sc. the divisions of the tribes of Israel arranged under different standards.');"><sup>10</sup></span> in the wilderness [marched].<span class="x" onmousemove="('comment',' The latter was level and suitable for public use while the ascents and descents of Palestine, as explained supra, are not easily accessible and are consequently unsuitable as public thoroughfares.');"><sup>11</sup></span>