ﷺ said, the Prophet ﷺ said, "Whoever keeps a horse for the cause of Allah out of faith in Allah and belief in His promise will find that the food it eats, the water it drinks, its dung, and its urine all weigh in his favor on the Day of Resurrection."
ﷺ يقول، قال النبي ﷺ: من احتبس فرسا في سبيل الله إيمانا بالله وتصديقا بوعده، فإن شبعه وريه وروثه وبوله في ميزانه يوم القيامة.
Bukhari narrated it in the Book of Jihad and Expeditions (2853), from Ali bin Hafs, who said, Ibn Mubarak told us, Talha bin Abu Saeed informed us, he said, I heard Saeed Maqburi narrating that he heard Abu Hurairah say, then he mentioned it.