Sahih Muslim 11989
In-book no 4712وَحَدَّثَنَا نَصْرُ بْنُ عَلِيٍّ الْجَهْضَمِيُّ، وَصَالِحُ بْنُ حَاتِمِ بْنِ وَرْدَانَ، جَمِيعًا عَنْ يَزِيدَ، - قَالَ الْجَهْضَمِيُّ حَدَّثَنَا يَزِيدُ بْنُ زُرَيْعٍ، - حَدَّثَنَا يُونُسُ بْنُ عُبَيْدٍ، عَنْ عَمْرِو بْنِ سَعِيدٍ، عَنْ أَبِي زُرْعَةَ بْنِ عَمْرِو بْنِ جَرِيرٍ، عَنْ جَرِيرِ بْنِ عَبْدِ اللَّهِ، قَالَ رَأَيْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم يَلْوِي نَاصِيَةَ فَرَسٍ بِإِصْبَعِهِ وَهُوَ يَقُولُ " الْخَيْلُ مَعْقُودٌ بِنَوَاصِيهَا الْخَيْرُ إِلَى يَوْمِ الْقِيَامَةِ الأَجْرُ وَالْغَنِيمَةُ " .
It has been narrated on the authority of Jarir b. Abdullah who said: I saw that the Messenger of Allah (ﷺ) was twisting the forelock of a horse with his fingers and he was saying: (A great) benefit. i. e. reward (for rearing them for Jihad) and spoils of war, has been tied to the forelocks of horses until the Day of Judgment.