And he wrote in the king Ahasuerus' name, and sealed it with the
king's ring, and sent letters by posts on horseback, and riders
on mules, camels, and young dromedaries: . . . .
So the posts that rode upon mules and camels went out, being
hastened and pressed on by the king's commandment. And the
decrees was given at Shushan the palace.
— Bible
Post