Muwatta Malik, Book 27, Hadith 1081 (In-Book) ⓘ

Yahya related to me from Malik from Yahya ibn Said that al-Qasim ibn Muhammad said, "Two grandmothers came to Abu Bakr asSiddiq, and he wanted to give the sixth to the one who was from the mother's side, and a man of the Ansar said, 'What? Are you omitting the one from whom he would inherit if she died while he was alive?' Abu Bakr divided the sixth between them.~

وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ يَحْيَى بْنِ سَعِيدٍ، عَنِ الْقَاسِمِ بْنِ مُحَمَّدٍ، أَنَّهُ قَالَ أَتَتِ الْجَدَّتَانِ إِلَى أَبِي بَكْرٍ الصِّدِّيقِ فَأَرَادَ أَنْ يَجْعَلَ السُّدُسَ، لِلَّتِي مِنْ قِبَلِ الأُمِّ فَقَالَ لَهُ رَجُلٌ مِنَ الأَنْصَارِ أَمَا إِنَّكَ تَتْرُكُ الَّتِي لَوْ مَاتَتْ وَهُوَ حَىٌّ كَانَ إِيَّاهَا يَرِثُ فَجَعَلَ أَبُو بَكْرٍ السُّدُسَ بَيْنَهُمَا ‏.‏