 ٢١ـ مُحَمَّدُ بْنُ يَحْيَى عَنْ مُحَمَّدِ بْنِ الْحُسَيْنِ عَنْ أَحْمَدَ بْنِ مُحَمَّدِ بْنِ أَبِي نَصْرٍ عَنْ مُحَمَّدِ بْنِ عَلِيٍّ عَنْ أَبِي الْحَسَنِ (عَلَيْهِ السَّلام) قَالَ سَأَلْتُهُ عَمَّا يُخْرَجُ مِنَ الْبَحْرِ مِنَ اللُّؤْلُؤِ وَالْيَاقُوتِ وَالزَّبَرْجَدِ وَعَنْ مَعَادِنِ الذَّهَبِ وَالْفِضَّةِ مَا فِيهِ قَالَ إِذَا بَلَغَ ثَمَنُهُ دِينَاراً فَفِيهِ الْخُمُسُ.
 21. Muhammad ibn Yahya has narrated from from Muhammad ibn al-Husayn from Ahmad ibn Muhammad ibn abu Nasr from Muhammad ibn Ali from abu al-Hassan  who has said the following. The narrator has said, “I asked him about what is taken out of the sea, such as pearls, ruby and chrysolite and minerals such as gold and silver and others as to how much is al-Khums on them?” The Imam  said, “If it would value up to a Dinar then al-Khums is due on it.”