It is narrated from Sayyiduna Arib Abu Abdullah al-Mulayki (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said that this verse, "Those who spend their wealth by night and by day, secretly and openly" [Surah al-Baqarah: 274], was revealed concerning spending on horses.
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 14576
It is narrated from Sayyiduna Arib al-Mulayki (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Goodness and nobility are tied to the forelocks of horses until the Day of Resurrection, and their owners are helped in (keeping) them. The one who spends on them is like one who stretches out both his hands in charity, and their urine and dung will be turned, for their owners, into the musk of Paradise with Allah on the Day of Resurrection."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 14577
It is narrated from Sayyiduna Arib al-Mulayki (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said concerning the saying of Allah Almighty, "And others besides them whom you do not know; Allah knows them" [Surah al-Anfal: 60], that it refers to the jinn. And the Prophet (peace and blessings be upon him) also said: "A house in which there is a horse of fine breed is not harmed (by the evil of the jinn)."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 14578