Esther 9:17-19

17This was on the thirteenth day of the month of Adar, and on the fourteenth day they rested and made that a day of feasting and gladness.

18But the Jews who were in Susa gathered on the thirteenth day and on the fourteenth, and rested on the fifteenth day, making that a day of feasting and gladness.

19Therefore the Jews of the villages, who live in the rural towns, hold the fourteenth day of the month of Adar as a day for gladness and feasting, as a holiday, and as a day on which they send gifts of food to one another.