Muwatta Imam Malik Book of Fara'id, Hadith 6

Yahya related to me from Malik from Abdu Rabbih ibn Said that Abu Bakr ibn Abd ar-Rahman ibn al-Harith ibn Hisham only gave a fixed share to two grandmothers (together).
Malik said, "The generally agreed on way of doing things among us in which there is no dispute and which I saw the people of knowledge in our city doing, is that the maternal grandmother does not inherit anything at all with the mother. Outside of that, she is given a sixth as a fixed share. The paternal grandmotherdoes not inherit anything along with the mother or the father. Outside of that she is given a sixth as a fixed share." If both the paternal grandmother and maternal grandmother are alive, and the deceased does not have a father or mother outside of them, Malik said,."I have heard that if the maternal grandmother is the nearest of the two of them, then she has a sixth instead of the paternal grandmother. If the paternal grandmother is nearer, or they are in the same position in relation to the deceased, the sixth is divided equally between them."
Malik said, "None of the female grand-relations except for these two has any inheritance because I have heard that the Messenger of Allah ﷺ gave the grandmother inheritance, and then Abu Bakr asked about that until someone reliable related from the Messenger of Allah ﷺ that he had made the grandmother an heir and given a share to her. Another grandmother came to Umar ibn al-Khattab, and he said, 'I am not one to add to fixed shares. If there are two of you together, it is between you. If either of you is left alone with it, it is hers.' " Malik said, "We do not know of anyone who made other than the two grandmothers heirs from the beginning of Islam to this day."

وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ عَبْدِ رَبِّهِ بْنِ سَعِيدٍ، أَنَّ أَبَا بَكْرِ بْنَ عَبْدِ الرَّحْمَنِ بْنِ الْحَارِثِ بْنِ هِشَامٍ، كَانَ لاَ يَفْرِضُ إِلاَّ لِلْجَدَّتَيْنِ . قَالَ مَالِكٌ الأَمْرُ الْمُجْتَمَعُ عَلَيْهِ عِنْدَنَا الَّذِي لاَ اخْتِلاَفَ فِيهِ وَالَّذِي أَدْرَكْتُ عَلَيْهِ أَهْلَ الْعِلْمِ بِبَلَدِنَا أَنَّ الْجَدَّةَ أُمَّ الأُمِّ لاَ تَرِثُ مَعَ الأُمِّ دِنْيَا شَيْئًا وَهِيَ فِيمَا سِوَى ذَلِكَ يُفْرَضُ لَهَا السُّدُسُ فَرِيضَةً وَأَنَّ الْجَدَّةَ أُمَّ الأَبِ لاَ تَرِثُ مَعَ الأُمِّ وَلاَ مَعَ الأَبِ شَيْئًا وَهِيَ فِيمَا سِوَى ذَلِكَ يُفْرَضُ لَهَا السُّدُسُ فَرِيضَةً فَإِذَا اجْتَمَعَتِ الْجَدَّتَانِ أُمُّ الأَبِ وَأُمُّ الأُمِّ وَلَيْسَ لِلْمُتَوَفَّى دُونَهُمَا أَبٌ وَلاَ أُمٌّ . قَالَ مَالِكٌ فَإِنِّي سَمِعْتُ أَنَّ أُمَّ الأُمِّ إِنْ كَانَتْ أَقْعَدَهُمَا كَانَ لَهَا السَّدُسُ دُونَ أُمِّ الأَبِ وَإِنْ كَانَتْ أُمُّ الأَبِ أَقْعَدَهُمَا أَوْ كَانَتَا فِي الْقُعْدَدِ مِنَ الْمُتَوَفَّى بِمَنْزِلَةٍ سَوَاءً فَإِنَّ السُّدُسَ بَيْنَهُمَا نِصْفَانِ . قَالَ مَالِكٌ وَلاَ مِيرَاثَ لأَحَدٍ مِنَ الْجَدَّاتِ إِلاَّ لِلْجَدَّتَيْنِ لأَنَّهُ بَلَغَنِي أَنَّ رَسُولَ اللَّهِ ﷺ وَرَّثَ الْجَدَّةَ ثُمَّ سَأَلَ أَبُو بَكْرٍ عَنْ ذَلِكَ حَتَّى أَتَاهُ الثَّبَتُ عَنْ رَسُولِ اللَّهِ ﷺ أَنَّهُ وَرَّثَ الْجَدَّةَ فَأَنْفَذَهُ لَهَا ثُمَّ أَتَتِ الْجَدَّةُ الأُخْرَى إِلَى عُمَرَ بْنِ الْخَطَّابِ فَقَالَ لَهَا مَا أَنَا بِزَائِدٍ فِي الْفَرَائِضِ شَيْئًا فَإِنِ اجْتَمَعْتُمَا فَهُوَ بَيْنَكُمَا وَأَيَّتُكُمَا خَلَتْ بِهِ فَهُوَ لَهَا . قَالَ مَالِكٌ ثُمَّ لَمْ نَعْلَمْ أَحَدًا وَرَّثَ غَيْرَ جَدَّتَيْنِ مُنْذُ كَانَ الإِسْلاَمُ إِلَى الْيَوْمِ .