Esther 9:20-23

20And Mordecai wrote these things, and sent letters unto all the Jews that were in all the provinces of the king Ahasuerus, both nigh and far, 21to enjoin them that they should keep the fourteenth day of the month Adar, and the fifteenth day of the same, yearly, 22as the days wherein the Jews had rest from their enemies, and the month which was turned unto them from sorrow to gladness, and from mourning into a good day; that they should make them days of feasting and gladness, and of sending portions one to another, and gifts to the poor. 23And the Jews undertook to do as they had begun, and as Mordecai had written unto them;