Mustadrak al-Hakim 7970

al-Ḥusayn b. al-Ḥasan b. Ayyūb > Abū Ḥātim al-Rāzī > Muḥammad b. ʿImrān b. Abū Laylá > Abū > Ibn Abū Laylá > al-Shaʿbī

"Regarding Umar, Ali, Abdullah, and Zaid, who are siblings from the same mother and father, and siblings from the same mother, it is said that the brothers from the same mother and father share one-third of the inheritance. This is because they claim to be offspring of the mother alone, and the father's presence only establishes a relationship of closeness. So, they are partners in one-third of the inheritance."

حَدَّثَنَاهُ الْحُسَيْنُ بْنُ الْحَسَنِ بْنِ أَيُّوبَ ثَنَا أَبُو حَاتِمٍ الرَّازِيُّ ثَنَا مُحَمَّدُ بْنُ عِمْرَانَ بْنِ أَبِي لَيْلَى أَنْبَأَ أَبِي عَنِ ابْنِ أَبِي لَيْلَى عَنِ الشَّعْبِيِّ

عَنْ عُمَرَ وَعَلِيٍّ وَعَبْدِ اللَّهِ وَزَيْدٍ فِي أُمٍّ وَزَوْجٍ وَإِخْوَةٍ لِأَبٍ وَأُمٍّ وَإِخْوَةٍ لِأُمٍّ «أَنَّ الْإِخْوَةَ مِنَ الْأَبِ وَالْأُمِّ شُرَكَاءُ لِلْإِخْوَةِ مِنَ الْأُمِّ فِي ثُلُثِهِمْ وَذَلِكَ أَنَّهُمْ قَالُوا هُمْ بَنُو أُمٍّ كُلُّهُمْ وَلَمْ يَزِدْهُمُ الْأَبُ إِلَّا قُرْبًا فَهُمْ شُرَكَاءُ فِي الثُّلُثِ»