Yahya related to me from Malik from Rabia ibn Abi Abd ar-Rahman from more than one source that the Messenger of Allah, may Allah bless him and grant him peace, assigned the mines of al Qabaliyya, which is in the direction of al-Fur, to Bilal ibn Harith al-Mazini, and nothing has been taken from them up to this day except zakat.
USC-MSA web (English) reference: Book 17, Hadith 8
Arabic reference: Book 17, Hadith 588