Esther 8:10
Mordecai wrote in the name of King Xerxes and sealed it with the royal signet ring. He sent the documents by mounted couriers riding on swift horses bred from the royal mares.
Berean Standard Bible
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:
He wrote in the name of King Ahasuerus, and sealed it with the king’s ring, and sent letters by courier on horseback, riding on royal horses that were bred from swift steeds.