Riyad as-SalihinChapter 11Hadith 651
Full Sharh — Riyad as-Salihin 651
وعن أبي هريرة رضي الله عنه قال: قال رسول الله صلى الله عليه وسلم: "من احتبس فرسًا في سبيل الله إيمانًا بالله وتصديقًا بوعده، فإن شبعه، وروثه، وبوله في ميزانه يوم القيامة” ((رواه البخاري)).
English Translation
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.".
Source
Riyad as-Salihin(رياض الصالحين)
The Book of Jihad
Hadith Number
651