'Horseback' in the Bible

Let the clothing and the horse be delivered to the hand of one of the king's most noble princes, that they may array the man whom the king delights to honor with them, and have him ride on horseback through the city square, and proclaim before him, 'Thus shall it be done to the man whom the king delights to honor!'"

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 bread from swift steeds.