Hadith 513870
Chapter 31: Business Transactions - كتاب البيوع
وَحَدَّثَنِي مَالِكٌ، عَنِ ابْنِ شِهَابٍ، أَنَّهُ سَأَلَهُ عَنِ الرَّجُلِ، يَتَكَارَى الدَّابَّةَ ثُمَّ يُكْرِيهَا بِأَكْثَرَ مِمَّا تَكَارَاهَا بِهِ فَقَالَ لاَ بَأْسَ بِذَلِكَ .
Malik related to me that he asked Ibn Shihab about a man who hired an animal, and then re-hired it out for more than what he hired it for. He said, "There is no harm in that."
Reference Muwatta Malik 513870
USC-MSA web (English) reference : Book 31, Hadith 102