Esther 3:7

In the first month, that is, the month Nisan, in the twelfth year of king Ahasuerus, they cast Pur, that is, the lot, before Haman from day to day, and from month to month, to the twelfth month, that is, the month Adar.

In the first month ... they cast Pur - that is, the lot х puwr (H6332) (Persian), explained in the Hebrew text by hagowraal (H1486), a calculus or pebble, here, the lot]. In resorting to this method of ascertaining the most auspicious day for putting his atrocious scheme into execution, Haman acted as the kings and nobles of Persia have always done, never engaging in any enterprise without consulting the astrologers, and being satisfied as to the lucky hour. Vowing revenge, but scorning to lay hands on a single victim, he meditated the extirpation of the whole Jewish race, who, he knew, were sworn enemies of his countrymen; and by artfully representing them as a people who were aliens in manners and habits, and enemies to the rest of his subjects, procured the king's sanction of the intended massacre. One motive which be used in urging his point was addressed to the king's cupidity. Fearing lest his master might object that the extermination of a numerous body of his subjects would seriously depress the public revenue, Haman premised to make up the loss.