It is narrated from Sa'id bin al-Musayyib that he said: "The Messenger of Allah (peace and blessings be upon him) forbade muzabanah and muhaqalah"; (this is the whole hadith), and in it the explanation of these terms is also given. The narrator said: I asked Sa'id bin al-Musayyib about renting out land for gold and silver, and he said: "There is no harm in it."
Hadith Referenceالمطالب العالية بزوائد المسانيد الثمانية / كتاب البيوع / 1415