Son of a Brother with a Grandfather
Al-Kāfi|Volume 7|Book 2|Chapter 23
13- مُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنِ ابْنِ فَضَّالٍ عَنِ ابْنِ بُكَيْرٍ عَنْ زُرَارَةَ عَنْ أَبِي جَعْفَرٍ (عَلَيْهِ السَّلام) أَنَّ رَسُولَ اللهِ (صَلَّى اللهُ عَلَيْهِ وَآلِه) أَطْعَمَ الْجَدَّةَ السُّدُسَ وَلَمْ يَفْرِضْ لَهَا شَيْئاً.
13. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from ibn Faddal from ibn Bukayr from Zurarah who has narrated the following: “Abu ‘Abd Allah عليه السلام, has said that the Messenger of Allah, O Allah, grant compensation to Muhammad and his family worthy of their services to Your cause, provided for the grandmother one-sixth but did not sanction anything for her.’”
- Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (23/170)
- Ṣaḥīḥ al-Kāfī, vol. 3, p. 282