Sayyiduna Urwah al-Bariqi (may Allah be pleased with him) said: I saw the Prophet (peace and blessings be upon him) come, with my paternal uncles, to a reddish (sorrel) mare in the market of Madinah. He (peace and blessings be upon him) took hold of the loose hair of her forelock with his two fingers and said: "Goodness is tied to the forelocks of horses until the Day of Resurrection."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 14487