Esther 9:20-22

Mordecai wrote all this down and sent copies to all the Jews in all King Xerxes’ provinces, regardless of distance, calling for an annual celebration on the fourteenth and fifteenth days of Adar as the occasion when Jews got relief from their enemies, the month in which their sorrow turned to joy, mourning somersaulted into a holiday for parties and fun and laughter, the sending and receiving of presents and of giving gifts to the poor.