Musannaf Ibn Abi Shaybah

33351 - From Sufyan, from someone who heard al-Sha'bi, he said regarding a mother, a sister from the father and mother, and a grandfather: That Zayd ibn Thabit said: Out of nine shares: for the mother three, for the grandfather four, and for the sister two. And that Ali said: For the sister half, which is three, for the mother a third, which is two shares, and what remains is for the grandfather, which is one share. And Ibn Mas'ud said: For the sister half, which is three, for the mother a sixth, which is one share, and what remains is for the grandfather, which is two shares. And Uthman said: In thirds: a third for the mother, a third for the sister, and a third for the grandfather. And Ibn Abbas said: For the mother a third, and what remains is for the grandfather (1).