Esther 9:31-32

New Revised Standard Version, Anglicised Catholic Edition

³¹ and giving orders that these days of Purim should be observed at their appointed seasons, as the Jew Mordecai and Queen Esther enjoined on the Jews, just as they had laid down for themselves and for their descendants regulations concerning their fasts and their lamentations. ³² The command of Queen Esther fixed these practices of Purim, and it was recorded in writing.