That the Messenger of Allah ﷺ said: "The forelocks of horses contain good until the Day of Judgement. The horse is for three (purposes): It is for one man a reward, and it is for one man a shelter (from poverty), and it is from one man a burden. As for the one who acquires it for the cause of Allah and then prepares it for that; it is for him a reward, nothing disappears into its stomach except that Allah writes it for him as a reward."  

قَالَ رَسُولُ اللَّهِ ﷺ الْخَيْلُ مَعْقُودٌ فِي نَوَاصِيهَا الْخَيْرُ إِلَى يَوْمِ الْقِيَامَةِ الْخَيْلُ لِثَلاَثَةٍ هِيَ لِرَجُلٍ أَجْرٌ وَهِيَ لِرَجُلٍ سِتْرٌ وَهِيَ عَلَى رَجُلٍ وِزْرٌ فَأَمَّا الَّذِي لَهُ أَجْرٌ فَالَّذِي يَتَّخِذُهَا فِي سَبِيلِ اللَّهِ فَيُعِدُّهَا لَهُ هِيَ لَهُ أَجْرٌ لاَ يَغِيبُ فِي بُطُونِهَا شَيْءٌ إِلاَّ كَتَبَ اللَّهُ لَهُ أَجْرًا وَفِي الْحَدِيثِ قِصَّةٌ  

"The Messenger of Allah said: 'There is goodness tied to the forelocks of horses until the Day of Resurrection. And horses are of three types: Those that bring reward to man, those that are a means of protection for a man, and those that are a burden (of sin) for a man. As for those that bring reward, they are kept for the cause of Allah and for Jihad. No fodder enters their stomach but for everything that enters their stomachs, reward is written for him, even if he puts them out to pasture.'" And he quoted the Hadith. (Using translation from Nasāʾī 3562)  

قَالَ رَسُولُ اللهِ ﷺ «الْخَيْلُ مَعْقُودٌ فِي نَوَاصِيهَا الْخَيْرُ إِلَى يَوْمِ الْقِيَامَةِ الْخَيْلُ ثَلَاثَةٌ فَهِيَ لِرَجُلٍ أَجْرٌ وَهِيَ لِرَجُلٍ سِتْرٌ وَهِيَ عَلَى رَجُلٍ وِزْرٌ فَأَمَّا الَّتِي هِيَ لَهُ أَجْرٌ فَالَّذِي يَحْتَسِبُهَا فِي سَبِيلِ اللهِ وَيَتَّخِذُهَا لَهُ وَلَا تُغَيِّبُ فِي بُطُونِهَا شَيْئًا إِلَّا كُتِبَ لَهُ بِكُلِّ شَيْءٍ غُيِّبَتْ فِي بُطُونِهَا أَجْرٌ وَلَوْ عَرَضَ لَهَا مَرْجٌ» وَسَاقَ الْحَدِيثَ