Related על מגילה 4:33

Cities surrounded by a wall from the time of Joshua bin Nun read [the megillah] on the fifteenth [of Adar]. Rabbi Yehuda ben Karchah says "[walled] since the time of Achashverosh". Rabbi Yose said in the name of Rabbi Yehudah, "Was Shushan the palace walled since the time of Joshua bin Nun?״ 'Each family, each state, each city' (Esther 9:28): Towns that are near the city and seem part of it are treated like it [with respect to reading the megillah on the 15th of Adar].

Cities surrounded by a wall from the time of Joshua bin Nun read [the megillah] on the fifteenth [of Adar]. Rabbi Yehuda ben Karchah says "[walled] since the time of Achashverosh". Rabbi Yose said in the name of Rabbi Yehudah, "Was Shushan the palace walled since the time of Joshua bin Nun?״ 'Each family, each state, each city' (Esther 9:28): Towns that are near the city and seem part of it are treated like it [with respect to reading the megillah on the 15th of Adar].