'Couriers' in the Bible

Letters [were] sent by couriers to all the provinces of the king to destroy, to kill, and to annihilate all the Jews, {both young and old}, women and children, on one day, the thirteenth day of the month, that [is] Adar, and to plunder their goods.

The couriers went out quickly by order of the king, and the law was issued in the citadel of Susa. The king and Haman sat down to drink; and the city of Susa was bewildered.

And he wrote in the name of King Ahasuerus, and he sealed [the letters] with the king's signet ring and sent them by couriers on horses, riding on royal horses {bred by} racing mares.

The mounted couriers on the royal horses went out without delay, urged by the king's word. The law was given in the citadel of Susa.