In the twelfth year of King Xerxes, in the first month, the month of Nisan, the Pur (that is, the lot) was cast before Haman to determine a day and month. And the lot fell on the twelfth month, the month of Adar.
Haman values himself upon that bold and daring thought, which he fancied well became his great spirit, of destroying all the Jews - an undertaking worthy of its author, and which he promised himself would perpetuate his memory. He doubts not but to find desperate and bloody hands enough to cut all their throats if the king will but give him leave.
Commenting on Esther 3:7-15
In the first month, that is the month Nisan,.... Which was the first month of the sacred year of the Jews, by divine appointment, Exo 12:2, and there called Abib, and answers to part of February and part of March; from hence it is clear this book was written by a Jew, and very probably by Mordecai: in the twelfth year of King Ahasuerus; four...
In the first month . . . they cast Pur, that is, 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.