Rashi
Jewish
1040–1105
“who join them proselytes who were destined to convert. according to their script that the Scroll [of Esther] should be written in the Ashuri script.”
From the early Church Fathers to now.
1 Jewish · 1 Reformed
“And the things that they suffered, and that were afterwards changed, the Jews took upon themselves and their seed, and upon all that had a mind to be joined to their religion, so that it should be lawful for none to pass these days without solemnity: which the writing testifieth, and certain times require, as the years continually succeed one another.”
“who join them proselytes who were destined to convert. according to their script that the Scroll [of Esther] should be written in the Ashuri script.”
“Then Esther the queen, the daughter of Abihail, and Mordecai the Jew, wrote with all authority,.... Strongly pressing the observance of this festival; before, Mordecai only recommended it, but now the queen gave a sanction to it, and laid her obligation on the Jews to observe it; perhaps some of the Jews were backward to it, or neglected to observe it, and therefore Esther and Mordecai joined in a letter to them, to press them to it; the Jewish chronologer (x) says, this was written the year following; the former Targum is, they wrote this whole volume, and the strength of the miracle, or set the miraculous deliverance in the strongest light, with this view: to confirm this second letter of Purim; that it might have its weight and influence upon them, to engage them to keep it, as the latter Targum adds; that when it was an intercalary year, they might not read the Megillah (or book of Esther) in the first Adar, but in the second Adar. (x) Seder Olam Rabba, c. 29. p. 87.”
The in-app commentary runs from the Fathers to the early-modern record, then stops — that's where the public-domain sources end, not where the reading does. For the modern reading, follow the sources directly.