Malik related to me that he asked Ibn Shihab about a man whohired an animal, and then re-hired it out for more than what he hiredit for. He said, "There is no harm in that." (RU)
USC-MSA web (English) reference: Book 31, Hadith 102 (RU)
Arabic reference (RU): Book 31, Hadith 1388 (RU)