The Prophet (ﷺ) said, "If somebody keeps a horse in Allah's Cause motivated by his faith in Allah and his belief in His Promise, then he will be rewarded on the Day of Resurrection for what the horse has eaten or drunk and for its dung and urine."
Sahih al-Bukhari Book 56, Hadith 69
← Previous Hadith The Prophet (ﷺ) said, "Good will remain (as a permanent quality) in the foreheads of horses (for Jihad) till the Day of Resurrection, for they bring about either a reward (in the Hereafter) or (war) booty (in this world)."

Sahih al-Bukhari Book 56, Hadith 68 Next Hadith → (from his father) Abu Qatada went out (on a journey) with Allah's Messenger (ﷺ) but he was left behind with some of his companions who were in the state of Ihram. He himself was not in the state of Ihram. They saw an opener before he could see it. When they saw the opener, they did not speak anything till Abu Qatada saw it. So, he rode over his horse called Al-Jarada and requested them to give him his lash, but they refused. So, he himself took it and then attacked the opener and slaughtered it. He ate of its meat and his companions ate, too, but they regretted their eating. When they met the Prophet (they asked him about it) and he asked, "Have you some of its meat (left) with you?" Abu Qatada replied, "Yes, we have its leg with us." So, the Prophet (ﷺ) took and ate it.

Sahih al-Bukhari Book 56, Hadith 70