Musannaf Ibn Abi Shaybah 33327 — When he leaves brothers

Ibrahim said: Sayyiduna Abdullah (may Allah be pleased with him) and Sayyiduna Zayd (may Allah be pleased with him) used to assign one third of the estate to the grandfather and two thirds of the estate to the brothers. And in the case of a man who dies leaving four full brothers, two full sisters and a grandfather, Sayyiduna Ali (may Allah be pleased with him) used to divide the estate into six shares and have the grandfather given one sixth; Sayyiduna Ali (may Allah be pleased with him) would not reduce the grandfather's share below one sixth in the presence of brothers, and the rest of the estate would be divided on the rule that a male is given double the share of a female. And Sayyiduna Abdullah and Sayyiduna Zayd (may Allah be pleased with him) used to give the grandfather one third of the estate and the brothers two thirds of the estate, on the rule that a male is given double the share of a female. And Ibrahim said about the case of five brothers and a grandfather: According to the statement of Sayyiduna Ali (may Allah be pleased with him), the grandfather has one sixth of the estate and the brothers have the remaining five shares, and Sayyiduna Abdullah (may Allah be pleased with him) and Zayd (may Allah be pleased with him) used to have the grandfather given one third of the estate and the brothers two thirds of the estate.