So the posts that rode upon mules and camels went out,.... Or on the mules, which in the Persian language were called "ahashteranim";
being hastened and pressed on by the king's commandment; who gave them a special order to make what haste they could, that the Jews might have time to prepare for their defence, and their enemies be the more intimidated:
and the decree was given at Shushan the palace; the king's counsellors agreeing to it, and perhaps signing it, as they did the former; see Esther 3:15.