Muhammad bin Bashar Bindar محمد بن بشار بندار · The Book of Horses, Races and Shooting

"Horses may bring reward to a man, or they may be a means of protection, or they may be a burden (of sin). As for that which brings reward, it is a man who keeps it for the cause of Allah and ties it with a long rope in a pasture or a garden; whatever it eats or drinks in that pasture or garden will count as good deeds for him. If it breaks its rope and jumps over one…

It was narrated from Abu Hurairah that the Prophet used to dislike the Shikal among horses.

It was narrated from Ibn 'Umar that the Messenger of Allah organized a horse race and sent them from Al-Hafya' and its finish line was Thaniyyat Al-Wada'; and he organized a race for horses that had not been made lean, and the course stretched from Ath-Thaniyyah to the Masjid of Banu Zuraiq.