When Sayyiduna Ibn Abbas (may Allah be pleased with them both) was in Basra, he wrote to Sayyiduna Ali (may Allah be pleased with him) that I have been asked about the issue of a grandfather and six brothers. Sayyiduna Ali (may Allah be pleased with him) wrote in reply that give the grandfather one-sixth (sudus), and after that do not give anything to anyone. (That is, one-sixth is for the grandfather, and the remaining five-sixths are for the brothers.)
Hadith Referenceسنن دارمي / من كتاب الفرائض / 2951
Hadith Gradingتحقیق (حسین سلیم أسد الدارانی):إسناده جيد والشيباني. هو: أبو إسحاق سليمان بن أبي سليمان، [مكتبه الشامله نمبر: 2960]
Hadith Takhrijاس روایت کی سند جید ہے۔ شیبانی کا نام ابواسحاق سلیمان بن ابی سلیمان ہے۔ دیکھئے: [ابن أبى شيبه 11269] ، [البيهقي 249/6] ، [المحلی 284/9] ، [فتح الباري 21/12] ۔ بیہقی کی سند میں قیس بن الربيع ضعیف ہیں۔