The Sufficient (Vol 7) · Hadith 354 (#Ḥadīth #14)
Chapter 23 | Son of a Brother with a Grandfather
14- أَحْمَدُ بْنُ مُحَمَّدٍ عَنِ ابْنِ فَضَّالٍ عَنْ عَبْدِ اللهِ بْنِ الْمُغِيرَةِ عَنْ مُوسَى بْنِ بَكْرٍ عَنْ زُرَارَةَ قَالَ سَمِعْتُ أَبَا عَبْدِ اللهِ يَقُولُ إِنَّ نَبِيَّ اللهِ ﷺ أَطْعَمَ الْجَدَّةَ السُّدُسَ طُعْمَةً.
14. Ahmad ibn Muhammad has narrated from ibn Faddal from ‘Abd Alfah ibn af-Mughirah from Musa ibn Bakr from Zurarah who has narrated the foffowing: “I once heard abu ‘Abd Allah , saying, ‘The Holy Prophet, O Allah, grant compensation to Muhammad and his family worthy of their services to Your cause, provided for the grandmother one-sixth as food.’”
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).