Esther 9:20-23

Mordecai recorded these events and sent letters to the Jews near and far, throughout all the provinces of King Xerxes, calling on them to celebrate an annual festival on these two days. He told them to celebrate these days with feasting and gladness and by giving gifts of food to each other and presents to the poor. This would commemorate a time when the Jews gained relief from their enemies, when their sorrow was turned into gladness and their mourning into joy. So the Jews accepted Mordecai’s proposal and adopted this annual custom.