Yahya related to me from Malik from Yahya ibn Said that theMessenger of Allah, may Allah bless him and grant him peace, was seenwiping the face of his horse with his cloak. He was questioned aboutit and said, "I was reproached in the night about horses." i.e. nottaking care of them.
USC-MSA web (English) reference: Book 21, Hadith 47
Arabic reference: Book 21, Hadith 1007