Therefore, because of the account found in this letter and what they had faced in this regard and what had happened to them, the Jews established as binding on themselves, their descendants, and all who joined their company that they should observe these two days without fail, just as written and at the appropriate time on an annual basis.

So Esther called for Hathach, one of the king’s eunuchs who had been placed at her service, ¹  and instructed him to find out the cause and reason for Mordecai’s behavior. ² 

Memucan then replied to the king and the officials, “The wrong of Queen Vashti is not against the king alone, but against all the officials and all the people who are throughout all the provinces of King Ahasuerus.

to establish these days of Purim in their proper times, just as Mordecai the Jew and Queen Esther had established, and just as they had established both for themselves and their descendants, matters pertaining to fasting and lamentation.