The Scroll and the Miracle

Then Queen Esther daughter of Abihail wrote a second letter of Purim for the purpose of confirming with full authority the aforementioned one of Mordecai the Jew. Dispatches were sent to all the Jews in the hundred and twenty-seven provinces of the realm of Ahasuerus with an ordinance of “equity and honesty:” These days of Purim shall be observed at their proper time, as Mordecai the Jew—and now Queen Esther—has obligated them to do, and just as they have assumed for themselves and their descendants the obligation of the fasts with their lamentations. And Esther’s ordinance validating these observances of Purim was recorded in a scroll.

Rabbi Asi said: Why was Esther likened to the dawn? It is to tell you: Just as the dawn is the conclusion of the entire night, so too, Esther was the conclusion of all miracles performed for the entire Jewish people.

§ And Rabbi Yehoshua ben Levi also said: Women are obligated in the reading of the Megilla, as they too were significant partners in that miracle. And Rabbi Yehoshua ben Levi also said: When Purim occurs on Shabbat, one asks questions and expounds upon the subject of the day. The Gemara raises a question with regard to the last halakha: Why was it necessary to specify Purim? The same principle applies also to the Festivals, as it is taught in a baraita: Moses enacted for the Jewish people that they should ask questions about and expound upon the subject of the day: They should occupy themselves with the halakhot of Passover on Passover, with the halakhot of Shavuot on Shavuot, and with the halakhot of the festival of Sukkot on the festival of Sukkot. The Gemara answers: It was necessary for Rabbi Yehoshua ben Levi to mention Purim, lest you say that when Purim falls on Shabbat we should decree that it is prohibited to expound upon the halakhot of the day due to the concern of Rabba, who said that the reason the Megilla is not read on a Purim that falls on Shabbat is due to a concern that one carry the Megilla in the public domain.
Rabbi Yehoshua ben Levi therefore teaches us that expounding the halakhot of the day is not prohibited as a preventive measure lest one read the Megilla on Shabbat. And Rabbi Yehoshua ben Levi further said with regard to Purim: A person is obligated to read the Megilla at night and then to repeat it [lishnota] during the day, as it is stated: “O my God, I call by day but You do not answer; and at night, and there is no surcease for me” (Psalms 22:3), which alludes to reading the Megilla both by day and by night.