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.
رَأَيْتُ رَسُولَ اللَّهِ ﷺ يَلْوِي نَاصِيَةَ فَرَسٍ بِإِصْبَعِهِ وَهُوَ يَقُولُ الْخَيْلُ مَعْقُودٌ بِنَوَاصِيهَا الْخَيْرُ إِلَى يَوْمِ الْقِيَامَةِ الأَجْرُ وَالْغَنِيمَةُ