Narrated Rabi'ah ibn AbuAbdurRahman: Rabi'ah reported on the authority of more than one person saying: The Messenger of Allah (ﷺ) assigned as a fief to Bilal ibn al-Harith al-Muzani the mines of al-Qabaliyyah which is in the neighbourhood of al-Fur', and only zakat is levied on those mines up to the present day

English translation · Sunan Abu Dawud