"Whoever keeps a horse for the cause of Allah out of faith in Allah and believing the promise of Allah, its feed, water, urine and dung will all count as Hasanat in the balance of his deeds." (Using translation from Nasāʾī 3582)
قَالَ رَسُولُ اللهِ ﷺ مَنِ احْتَبَسَ فَرَسًا فِي سَبِيلِ اللهِ إِيمَانًا بِاللهِ وَتَصْدِيقًا بِمَوْعُودِهِ كَانَ شِبَعُهُ وَرِيُّهُوَبَوْلُهُ وَرَوْثُهُ حَسَنَاتٍ فِي مِيزَانِهِ يَوْمَ الْقِيَامَةِ