Esther 9:26-29 GNT

29 Then Queen Esther, the daughter of Abihail, along with Mordecai, also wrote a letter, putting her full authority behind the letter about Purim, which Mordecai had written earlier.
30 The letter was addressed to all the Jews, and copies were sent to all the 127 provinces of the Persian Empire. It wished the Jews peace and security
31 and directed them and their descendants to observe the days of Purim at the proper time, just as they had adopted rules for the observance of fasts and times of mourning. This was commanded by both Mordecai and Queen Esther.
32 Esther's command, confirming the rules for Purim, was written down on a scroll.