Est Esther, chapter Book of Esther, chapter 3
In the twelfth year of King Xerxes, in the first month, the month of Nisan, “pur” (meaning a “lot”) was cast in Haman's presence to choose a day and month,3:7. Casting lots was an ancient way of determining the most “favorable” time for a particular action, in this case Haman's plan to destroy the Jews. taking each day and each month one at a time. The lot fell on the twelfth month, the month of Adar.Est 9:24; Pro 14:32