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. (Using translation from Muslim 1872a)  

رَأَيْتُ رَسُولَ اللهِ ﷺ يَفْتِلُ نَاصِيَةَ فَرَسٍ بَيْنَ إِصْبُعَيْهِ وَيَقُولُ «الْخَيْلُ مَعْقُودٌ فِي نَوَاصِيهَا الْخَيْرُ إِلَى يَوْمِ الْقِيَامَةِ الْأَجْرُ وَالْغَنِيمَةُ»  

Messenger of Allah ﷺ said, "Good will remain (as a permanent quality) in the foreheads of horses till the Day of Resurrection." (Using translation from Bukhārī 2849)  

عَنِ النَّبِيِّ ﷺ قَالَ «الْخَيْلُ فِي نَوَاصِيهَا الْخَيْرُ إِلَى يَوْمِ الْقِيَامَةِ»  

"The Messenger of Allah said: 'Goodness is tied to the forelocks of horses until the Day of Resurrection.'" (Using translation from Nasāʾī 3574)  

قَالَ رَسُولُ اللهِ ﷺ «الْخَيْلُ مَعْقُودٌ فِي نَوَاصِيهَا الْخَيْرُ إِلَى يَوْمِ الْقِيَامَةِ»  

The Prophet ﷺ said, "Good will remain (as a permanent quality) in the foreheads of horses (for Jihad) till the Day of Resurrection, for they bring about either a reward (in the Hereafter) or (war) booty (in this world)." (Using translation from Bukhārī 2852)  

أَنَّهُ سَمِعَ النَّبِيَّ ﷺ يَقُولُ «الْخَيْلُ مَعْقُودٌ فِي نَوَاصِيهَا الْخَيْرُ إِلَى يَوْمِ الْقِيَامَةِ الْأَجْرُ وَالْمَغْنَمُ»  

Great good is attached to the forelock of the horses until the Day of Judgment. (Using translation from Muslim 1873a)  

سَمِعْتُ رَسُولَ اللهِ ﷺ يَقُولُ «الْخَيْلُ مَعْقُودٌ فِي نَوَاصِيهَا الْخَيْرُ إِلَى يَوْمِ الْقِيَامَةِ الْأَجْرُ وَالْمَغْنَمُ»  

The Prophet ﷺ said, "Good will remain (as a permanent quality) in the foreheads of horses (for Jihad) till the Day of Resurrection, for they bring about either a reward (in the Hereafter) or (war) booty (in this world)." (Using translation from Bukhārī 2852)  

عَنِ النَّبِيِّ ﷺ قَالَ «الْخَيْلُ مَعْقُودٌ فِي نَوَاصِيهَا الْخَيْرُ إِلَى يَوْمِ الْقِيَامَةِ الْأَجْرُ وَالْمَغْنَمُ»