٧- عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ أَحْمَدَ بْنِ مُحَمَّدِ بْنِ عِيسَى عَنِ الْحُسَيْنِ بْنِ سَعِيدٍ عَنْ عَبْدِ اللهِ بْنِ بَحْرٍ عَنْ حَرِيزٍ عَنْ زُرَارَةَ قَالَ قَالَ لِي أَبُو عَبْدِ اللهِ (عَلَيْهِ السَّلام) يَا زُرَارَةُ مَا تَقُولُ فِي رَجُلٍ تَرَكَ أَبَوَيْهِ وَإِخْوَتَهُ مِنْ أُمِّهِ قَالَ قُلْتُ السُّدُسُ لأمِّهِ وَمَا بَقِيَ فَلِلأبِ فَقَالَ مِنْ أَيْنَ قُلْتَ هَذَا قُلْتُ سَمِعْتُ اللهَ عَزَّ وَجَلَّ يَقُولُ فِي كِتَابِهِ فَإِنْ كانَ لَهُ إِخْوَةٌ فَلأمِّهِ السُّدُسُ فَقَالَ وَيْحَكَ يَا زُرَارَةُ أُولَئِكَ الإخْوَةُ مِنَ الأبِ فَإِذَا كَانَ الإخْوَةُ مِنَ الأمِّ لَمْ يَحْجُبُوا الأمَّ عَنِ الثُّلُثِ. 
7. A number of our people have narrated from Ahmad ibn Muhammad ibn ‘Isa from al-Husayn ibn SaTd from ‘Abd Allah ibn Bahr from Hariz from Zurarah who has narrated the following: “Abu ’Abd Allah , once said to me, ’O Zurarah, what do you say about the case of a man who leaves behind his both parents and brothers from his mother’s side?’ He (the narrator) has said that he said, ‘One-sixth is for the mother and the rest is for the father.’ He (the Imam) asked, ’On what basis do you say so?’ I replied, ‘I have heard Allah, most Majestic, most Glorious, saying in His book, ’. . . if there are brothers then one-sixth is for his mother.’ (4:11) He (the Imam) said, ’Fie on you O Zurarah, they are brothers from the father’s side. If brothers are from the mother’s side, they do not bar the mother from receiving the one-third.’” 