Reference for Arakhin 64:20

וכי אלו בלבד היו

And not only these [are walled cities], but any one concerning which you have a tradition from your fathers that it was encompassed by a wall since the days of Joshua B'Nun, then all these laws apply to it, because as to the first consecration, he consecrated it not only for the time being, but for the future?<span class="x" onmousemove="('comment',' V. Shebu., Sonc. ed., p. 80 notes.');">⁷</span>

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