مُوَطَّأُ مَالِكٍ
Muwatta Malik 1388
Business Transactions
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."
Arabic/English book reference: Book 31, Hadith 102