Esther 8:10

8:10 He wrote the name of king Ahasuerus, and sealed it with the king's ring, and sent letters by post on horseback, riding on swift steeds that were used in the king's service, bred of the stud:
-World English Bible

Other Translation

8:10 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:
-King James Version