Al-Kāfi
Hadith 3467- الْفَضْلُ عَنِ ابْنِ مَحْبُوبٍ عَنْ سَعْدِ بْنِ أَبِي خَلَفٍ عَنْ بَعْضِ أَصْحَابِ أَبِي عَبْدِ اللهِ عَنْ أَبِي عَبْدِ اللهِ (عَلَيْهِ السَّلام) قَالَ فِي بَنَاتِ أُخْتٍ وَجَدٍّ فَقَالَ لِبَنَاتِ الأخْتِ الثُّلُثُ وَمَا بَقِيَ فَلِلْجَدِّ فَأَقَامَ بَنَاتِ الأخْتِ مَقَامَ الأخْتِ وَجَعَلَ الْجَدَّ بِمَنْزِلَةِ الأخِ.
7. Al-Fadl has narrated from ibn Mahbub from Sa‘d ibn abu Khalaf from certain persons of abu ‘Abd Allah (a.s.), who has narrated the following: “About the case of daughters of a sister and a grandfather, abu ’Abd Allah (a.s.), has said, ‘The daughter of a sister receives one-third and the rest is for the grandfather; the daughters of the sister take the place of the sister and have made the grandfather like a brother.”’