Haman son of Hammedatha, the Agagite, the archenemy of all Jews, had schemed to destroy all Jews. He had cast the pur (the lot) to throw them into a panic and destroy them. But when Queen Esther intervened with the king, he gave written orders that the evil scheme that Haman had worked out should boomerang back on his own head. He and his sons were hanged on the gallows. That’s why these days are called “Purim,” from the word pur or “lot.”