The Ran notes that there is a concept (Bamidbar 15:16) that there is one Torah and one law for all Jews. In other words, there should ordinarily be only one day for all Jews to celebrate together. For this reason, Mendel Weinbach notes, usually, according to Halacha (Mishna Berura 688:12), where one spends Purim determines when one will celebrate it. For example, a Jew visiting a walled city temporarily nevertheless celebrates it there for purposes of achdus (“unity”).
R’ Betzalel haKohen of Vilna, however, writes that this distinction is meant to stress that Purim is a d’rabbanan (“rabbinic”) holiday, since the Torah’s (Devarim 13:1) prohibition to add to the given mitzvos only applies to d’oraisa (“Scriptural”) laws.
A story is told of a visitor from Bnei Brak in the home of R’ Shlomo Bloch in Yerushalayim. R’ Bloch invited him to drink at his Purim feast (on Shushan Purim), but since he had already drunk the previous day, the visitor argued that he had already fulfilled the mitzva of drinking on Purim. R’ Bloch retorted, “You may have fulfilled Purim, but you can still fulfill the mitzva of feeling another Jew’s joy.”
The Chasam Sofer gives another reason to have two days of Purim – to avoid bitul Torah. Since the Mishna (Avos 1:2) teaches that Torah is one of the three foundations upon which the world stands, if there were (chas v’Shalom) one moment when nobody was learning Torah, the world would cease to exist immediately. With the advent of Shushan Purim, while one group is drinking and celebrating, the other group can uphold the world by learning.
The Jews responded to this news with a total of six actions: they mourned, fasted, cried, eulogized, and donned sack and ash. The M’nos HaLevi writes that there is significance to this number. These six actions correspond to the six days in which the Jews participated in Achashverosh’s party (see Esther 1:5). Indeed it was a seven-day party, and the Jews took a break from the last day because it was Shabbos.
Since the verse that describes Achashverosh’s party (1:4), the verse says the party lasted for many days (yamim rabim), and gives the number of days as 180, R’ Yehonason Eibshutz wonders why the phrase “yamim rabim” is not superfluous. He answers that this phrase refers to the kind of days they were, long summer days, concluding with Yom Kippur. This is the day on which no Jew sins. In fact, he adds that the gematria of the Satan (hasatan) is 364 (5+300+9+50), one less than the total amount of days in a solar year, indicating that the Evil Inclination has no hold on us for one days out of the year – Yom Kippur. Therefore, there were only six days for which the Jews needed to atone.
The Ginzei HaMelech writes that the Sfas Emes views Megillas Esther as the beginning of the Oral Law. Mordechai was even a member of the Anshei Kenesset HaGedolah (Men of the Great Assembly) that began the establishment of Rabbinic law. The Oral Law is represented by the number six, as that is the total number of Orders in the Mishnah – Seeds, Festivals, Women, Damages, Holy Items, Purity. The Jews mourned in six different ways in to show their new-found reverence for the Oral Law.
Interestingly, according to the Vilna Gaon, there are not six actions here, but five. In his understanding, the great mourning is not a separate action, but is one general action described with the remaining five detailed descriptions. According to him, these five correspond to the five actions Jews are supposed to take (Mishnah, Taanis 1:3-7) when they are suffering agriculturally.
The Vilna Gaon points out that “ma’amar” (“instruction”) is a word connoting a gentle form of speaking. Esther, being queen, still followed Mordechai’s instructions like a daughter following the gentle reproach of a parent even after leaving his authority. Rashi adds that Mordechai sat at the king’s gate (see next verse), gently reminding Esther that she was Jewish and thus had responsibilities to H-Shem.
The Talmud (Megillah 13b) says that Esther showed her niddah questions to Mordechai, as it may be necessary at times to seek rabbinic advice in this area according to the halachah (Shulchan Aruch, Yoreh Deah 193:1). In fact, the Yerushalmi states that Esther asked Mordechai other questions in regard to rabbinic law. In other words, she was asking specifically issues of rabbinic law.
Rabbi Dovid Feinstein says that Esther was following Mordechai’s advice because she knew she was a part of H-Shem’s plan, but did not know how, and did not want to get in the way of this Divine plan.
Rabbi Tzvi HaCohen Kaplan writes that Esther’s prophecy mentioned earlier (mentioned previously) was a direct result of her fidelity to Mordechai, trusting the Torah of the Rabbis in these difficult times.
Another opinion in the Talmud there is that Esther had relations with Achashverosh, went to the mikvah, and then had relations with Mordechai. Although she was taken by force, and so allowed to Mordechai, Esther seemingly should have waited the requisite three months (Yevamos 35a) before having relations with her husband, unless it was actually a sheid (as mentioned in previous posts) having relations with the king. Perhaps going to the mikvah was Esther’s way to feel more pure, even if she wasn’t so in actual fact.