Imran bin Husain · The Book of Horses, Races and Shooting

"Whoever keeps a horse for the cause of Allah out of faith in Allah and believing the promise of Allah, its feed, water, urine and dung will all count as Hasanat in the balance of his deeds."

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.