Esther 9:20

“And Mordecai wrote these things, etc.] The transactions of those two days, and the causes of them, as well as the following letter; some conclude from hence that he was the penman of the book; and so he might be, but it does not necessarily follow from hence: and sent letters unto all the Jews that were in all the provinces of the King Ahasuerus, both nigh and far; such as were near the city Shushan, and those that were at the greatest distance from it; these were more especially the things he wrote.”

“THE TWO DAYS OF PURIM MADE FESTIVAL. (Est 9:20-32) Mordecai wrote these things--Commentators are not agreed what is particularly meant by "these things"; whether the letters following, or an account of these marvellous events to be preserved in the families of the Jewish people, and transmitted from one generation to another.”

“Mordecai: That is, as the words imply, the history contained in this book; and not merely the letters afterwards mentioned, as some understand it. wrote these: Exo 17:14; Deu 31:19-22; Ch1 16:12; Psa 124:1-3, Psa 145:4-12; Co2 1:10, Co2 1:11 in all the provinces: Est 1:1, Est 1:22, Est 3:12, Est 8:9 Esther 9:22”

“The feast of Purim instituted by letters from Mordochai and Esther. Est 9:20. Mordochai wrote these things, and sent letters to all the Jews, etc. האלּה הדּברים does not mean the contents of the present book but the events of the last days, especially the fact that the Jews, after overcoming their enemies, rested in Susa on the 15th, in the other provinces on the 14th Adar, and kept these days as days of rejoicing. This is obvious from the object of these letters, Est 9:21 : וגו עליהם לקיּם, to appoint among them "that they should keep the 14th day of the month Adar and the 15th day of the same yearly, as the days on which the Jews rested from their enemies, and as the month which was turned…”