Sunan an-Nasa'i 3582
سنن النسائي#3582Sahihقَالَ الْحَارِثُ بْنُ مِسْكِينٍ قِرَاءَةً عَلَيْهِ وَأَنَا أَسْمَعُ، عَنِ ابْنِ وَهْبٍ، حَدَّثَنِي طَلْحَةُ بْنُ أَبِي سَعِيدٍ، أَنَّ سَعِيدًا الْمَقْبُرِيَّ، حَدَّثَهُ عَنْ أَبِي هُرَيْرَةَ، عَنْ رَسُولِ اللَّهِ صلى الله عليه وسلم قَالَ " مَنِ احْتَبَسَ فَرَسًا فِي سَبِيلِ اللَّهِ إِيمَانًا بِاللَّهِ وَتَصْدِيقًا لِوَعْدِ اللَّهِ كَانَ شِبَعُهُ وَرِيُّهُ وَبَوْلُهُ وَرَوْثُهُ حَسَنَاتٍ فِي مِيزَانِهِ " .
It was narrated from Abu Hurairah that the Messenger of Allah said:"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
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
In-book reference: 28:22