2. And the king removed his ring that he took from Haman, and gave it to Mordechai. And Esther placed Mordechai over Haman’s house.
When Achashverosh gave his signet ring to Haman (Esther 3:4), the Midrash (Esther Rabba 7:7) showed parallels in the giving of the ring to the story of Yosef, who also received the signet ring of a gentile monarch, Pharoah. R’ Avigdor Bonchek explains that the central connection is the constant presence of an unexpected turnaround in Jewish history.
The Vilna Gaon adds that by giving his ring, Achashverosh gave to Mordechai the honor with which Haman prided himself on, besides his money.
11. And every day and day, Mordechai would be walking in front of the courtyard of the house of women to know the condition of Esther and what was done with her.
The Midrash (Esther Rabbah 6:8) says that Mordechai’s caring for Esther merited his later caring for the entire Jewish nation, as the last verse in Megillas Esther (10:3) says “he sought the good of the entire nation, and found peace for all his offspring.”
According to Sfas Emes, the phrase “day and day” means that Mordechai checked on Esther consistently, daily. The mark of a true “tzaddik” (“righteous person”), as we said before, is consistency. Mordechai’s constant care for Esther merited his participation in the Purim miracle. The Tarlaz notes that Megillas Esther uses the same language of “yom v’yom” (“day and day”) again later (3:4) when Mordechai refuses to bow to Haman, again, consistently.