Esther 9:17-19

17This happened on the thirteenth day of Adar and on the fourteenth day they rested, making it a day of feasting and gladness.

18But the Jews that were in Shushan had assembled on the thirteenth and on the fourteenth and on the fifteenth they rested, making it a day of feasting and gladness.

19That is why the rural Jews—those living in unwalled villages—make the fourteenth day of the month Adar a day of gladness and feasting, a day of sending presents of food to one another.