Musannaf Ibn Abi Shaybah

Ibrahim states that Hazrat Abdullah (may Allah be pleased with him) and Hazrat Zaid (may Allah be pleased with him) used to allocate one-third of the wealth for the grandfather and two-thirds for the brothers. And in the case where a man dies leaving behind his real brothers, two real sisters, and a grandfather, Hazrat Ali (may Allah be pleased with him) used to divide the wealth into six parts, giving the grandfather one-sixth, and Hazrat Ali (may Allah be pleased with him) would not reduce the grandfather’s share to less than one-sixth in the presence of brothers. The remaining wealth would be distributed according to the rule that a male receives twice the share of a female. And Hazrat Abdullah and Hazrat Zaid (may Allah be pleased with them) used to give the grandfather one-third of the wealth and the brothers two-thirds, according to the rule that a male receives twice the share of a female. And regarding the case of five brothers and one grandfather, Ibrahim said that according to Hazrat Ali’s (may Allah be pleased with him) opinion, the grandfather receives one-sixth of the wealth and the brothers the remaining five parts, while Hazrat Abdullah (may Allah be pleased with him) and Zaid (may Allah be pleased with him) used to give the grandfather one-third of the wealth and the brothers two-thirds.