[Machine] Ali and Zaid feed the grandmother, whether it's one-sixth, two-sixths, or three-sixths. They do not decrease or increase from it if their relationship to the deceased is the same. However, if one of them is closer, then the sixth belongs to her alone, separate from them. Abdullah used to distribute among the closer and farther in the sixth if they are in different places. The grandmothers are not excluded from the sixth, except for the mother.  

عَلِيٌّ وَزَيْدٌ ؓ يُطْعِمَانِ الْجَدَّةَ أَوِ الثِّنْتَيْنِ أَوِ الثَّلَاثَ السُّدُسَ لَا يُنْقَصْنَ مِنْهُ وَلَا يُزَدْنَ عَلَيْهِ إِذَا كَانَتْ قَرَابَتُهُنَّ إِلَى الْمَيِّتِ سَوَاءً فَإِنْ كَانَتْ إِحْدَاهُنَّ أَقْرَبَ فَالسُّدُسُ لَهَا دُونَهُنَّ وَكَانَ عَبْدُ اللهِ يُشْرِكُ بَيْنَ أَقْرَبِهِنَّ وَأَبْعَدِهِنَّ فِي السُّدُسِ إِنْ كُنَّ بِمَكَانٍ شَتَّى وَلَا يَحْجُبُ الْجَدَّاتِ مِنَ السُّدُسِ إِلَّا الْأُمُّ