Abu Hurairah (May Allah be pleased with him) reported:
The Messenger of Allah (ﷺ) said, "He who keeps a horse for Jihad purposes, having faith in Allah and relying on His Promise, will find that its fodder, drink, droppings and urine will all be credited to him in his Scales on the Day of Resurrection."[Al- Bukhari].
App reference: Book 12, Hadith 46
Arabic/English book reference: Book 12, Hadith 1330