The Book on Government
33/26. Chapter:
The virtue of horses; "Goodness is tied to their Forelocks."
Sahih Muslim
حَدَّثَنَا يَحْيَى بْنُ يَحْيَى، قَالَ قَرَأْتُ عَلَى مَالِكٍ عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " الْخَيْلُ فِي نَوَاصِيهَا الْخَيْرُ إِلَى يَوْمِ الْقِيَامَةِ " .
It has been narrated on the authority of Ibn Umar that the Messenger of Allah (ﷺ) said: There will be great benefit in the forelock of the horses until the Day of judgment.
Reference : Sahih Muslim 1871aIn-book reference : Book 33, Hadith 141USC-MSA web (English) reference : Book 20, Hadith 4612