19. Ali ibn Ibrahim has narrated from his father from ibn abu ‘Umayar from Hammad from abu ‘Abdallah who has said the following about how much al-Khums is on treasures. “One fifth of treasure found is paid as al-Khums.” The question said, “How much is on minerals?” The Imam said, “one fifth. So is lead, zinc and iron. All minerals are like gold and silver on which the religious due is one fifth.”