Reference for Arakhin 64:26

הא אמרינן דלא צריך לקדושינהו

Rather, he compares their arrival in the days of Ezra to their arrival in the days of Joshua: just as at their arrival in t days of Joshua they counted the years of release and the Jubilees, and consecrated cities encompassed by walls, thus also at their arrival in the days of Ezra they counted the years of release and the Jubilees.

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