ENOfficial
He reported God’s Messenger as saying, “Blessing rests on the forelocks of the horses.” (Bukhari and Muslim.)
Source: sunnah.com
Other translations
Arabic
وَعَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: (الْبَرَكَةُ فِي نَوَاصِي الْخَيل)
sunnah.com