Esther 9:18-20

18But the Jews in Susa had assembled on the thirteenth and fourteenth. They rested on the fifteenth and made it a day of feasting and celebration.

19That is why the Jews who live in the villages and in the unwalled towns make the fourteenth day of the month of Adar a holiday for feasting and celebration. They also send gifts of food to one another.

20Now, Mordecai wrote these things down and sent official letters to all the Jews in all the provinces of King Xerxes, near and far.