Adam Clarke, on Esth 9:20

“And Mardochai wrote all these things, and sent them comprised in letters to the Jews that abode in all the king’s provinces, both those that lay near and those afar off,”

“Mordecai wrote these things - It has been supposed that thus far that part of the book of Esther, which was written by Mordecai extends: what follows to the end, was probably added either by Ezra, or the men of the Great Synagogue; though what is said here may refer only to the letters sent by Mordecai to the Jews of the provinces. From this to the end of the chapter is nothing else than a recapitulation of the chief heads of the preceding history, and an account of the appointment of an annual feast, called the feast of Purim, in commemoration of their providential deliverance from the malice of Haman.”

Imported from an open dataset — not yet checked against the printed edition.