Dispatches were sent by swift messengers into all the provinces of the empire, giving the order that all Jews—young and old, including women and children—must be killed, slaughtered, and annihilated on a single day. This was scheduled to happen on March 7 of the next year. The property of the Jews would be given to those who killed them.
4
Currently, the Jews keep three days—the 13th, the 14th, and the 15th of Adar—as connected with “the Feast of Purim;” but they make the 13th a fast,…

Posts. —Literally, the runners. (See Note on Esther 1:22.)

And the letters were sent by post into all the king's
provinces
Or by the runners

Without some acquaintance with the human heart and the history of mankind, we would not think that any prince could consent to a dreadful proposal,…
Albert Barnes
AlbertBarnes