Dreaming of a foal indicates that you will have good news. If the foal is with the mare, it indicates that you will be prosperous.
Dreaming of riding a horse indicates that you will soon become rich and famous, with a long position, or your troubles will be solved. In terms of sex, when I dream of riding a horse, I immediately feel violent bumps in my dream, which represents a strong sexual impulse and desire; If you ride a wild horse, you have enjoyed sex.
See riding a horse, fame and fortune. Duke Zhou
Dream of horses, Ji; Ride, Dafu. Dunhuang dream book