Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates: The Prophet Muhammad (peace and blessings be upon him) said: "Whoever, believing in Allah, affirming His promise, and hoping for reward, ties a horse in the way of Allah, then its food, its drink, and its dung will be counted as good deeds for that person in his record of deeds on the Day of Resurrection."
Hadith Referenceصحیح ابن حبان / كتاب السير / 4673
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيصحيح: خ.فضيلة الشيخ العلّامة شُعيب الأرناؤوطإسناده صحيح على شرط البخاري