Muhammad (bin Sirin) narrates from Abidah, who said: I memorised from Sayyiduna Umar (may Allah be pleased with him) a hundred rulings concerning the grandfather. And he (Umar) said: I have given various rulings concerning the grandfather, and in all of them I spared no effort to reach the truth. If I live until the summer, if Allah wills, I will give a ruling on it so clear that even a woman could judge by it while sitting on the hem of her garment.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الفرائض / 12413