مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 1798
Zakat
Property on which Zakat is Payable - Section 1
وَعَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسلم: «العجماء جرحها جَبَّار والبشر جَبَّار والمعدن جَبَّار وَفِي الرِّكَاز الْخمس»
Abu Huraira reported God’s messenger as saying, “No retaliation is payable for a wound caused by a dumb animal, or for an accident in a well or a mine, but a fifth is payable on buried treasure.” * (Bukhari and Muslim.) * The word used (rikaz) is applied to treasure buried by people in pre-Islamic times; but the word may also mean metal in mines.
Mishkat al-Masabih, 1798مُتَّفَقٌ عَلَيْهِ (الألباني)