“The commandment of Esther confirmed these matters of Purim; and it was written in the book.”
Esther 9:32 (WEB)
Context Reading
30He sent letters to all the Jews in the hundred twenty-seven provinces of the kingdom of Ahasuerus with words of peace and truth, 31to confirm these days of Purim in their appointed times, as Mordecai the Jew and Esther the queen had decreed, and as they had imposed upon themselves and their descendants in the matter of the fastings and their mourning. 32The commandment of Esther confirmed these matters of Purim; and it was written in the book.