Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
hakim:7984 – Abū Bakr b. Isḥāq > ʿAbdullāh b. Aḥmad b. Ḥanbal > Abū Kāmil al-Jaḥdarī > al-Faḍl b. Sulaymān > Mūsá b. ʿUqbah > Isḥāq b. Yaḥyá b. al-Walīd b. ʿUbādah > ʿUbādah b. al-Ṣāmit > In Min

[Machine] Indeed, the distribution of the Prophet's inheritance ﷺ gives both grandmothers an equal share of one-sixth each.  

الحاكم:٧٩٨٤ – حَدَّثَنَا أَبُو بَكْرِ بْنُ إِسْحَاقَ أَنْبَأَ عَبْدُ اللَّهِ بْنُ أَحْمَدَ بْنِ حَنْبَلٍ ثَنَا أَبُو كَامِلٍ الْجَحْدَرِيُّ ثَنَا الْفَضْلُ بْنُ سُلَيْمَانَ ثَنَا مُوسَى بْنُ عُقْبَةَ عَنْ إِسْحَاقَ بْنِ يَحْيَى بْنِ الْوَلِيدِ بْنِ عُبَادَةَ عَنْ عُبَادَةَ بْنِ الصَّامِتِ قَالَ

«إِنَّ مِنْ قَضَاءِ رَسُولِ اللَّهِ ﷺ لِلْجَدَّتَيْنِ مِنَ الْمِيرَاثِ السُّدُسَ بَيْنَهُمَا بِالسَّوِيَّةِ»  

هَذَا حَدِيثٌ صَحِيحٌ عَلَى شَرْطِ الشَّيْخَيْنِ وَلَمْ يُخَرِّجَاهُ على شرط البخاري ومسلم

See similar narrations below:

Collected by Bayhaqī
bayhaqi:12344 – Abū al-Ḥasan ʿAlī b. Muḥammad al-Muqriʾ > al-Ḥasan b. Muḥammad b. Isḥāq > Yūsuf b. Yaʿqūb > Muḥammad b. Abū Bakr > Fuḍayl b. Sulaymān > Mūsá b. ʿUqbah > Isḥāq b. Yaḥyá b. al-Walīd > ʿUbādah b. al-Ṣāmit

[Machine] Indeed, it is from the decree of the Messenger of Allah ﷺ that he has decreed for the two grandmothers from the inheritance a sixth (of total inheritance), whether from Is-haq or 'Ubadah, the one being sent.  

البيهقي:١٢٣٤٤ – أَخْبَرَنَا أَبُو الْحَسَنِ عَلِيُّ بْنُ مُحَمَّدٍ الْمُقْرِئُ أنا الْحَسَنُ بْنُ مُحَمَّدِ بْنِ إِسْحَاقَ ثنا يُوسُفُ بْنُ يَعْقُوبَ ثنا مُحَمَّدُ بْنُ أَبِي بَكْرٍ ثنا فُضَيْلُ بْنُ سُلَيْمَانَ ثنا مُوسَى بْنُ عُقْبَةَ حَدَّثَنِي إِسْحَاقُ بْنُ يَحْيَى بْنِ الْوَلِيدِ عَنْ عُبَادَةَ بْنِ الصَّامِتِ قَالَ

إِنَّ مِنْ قَضَاءِ رَسُولِ اللهِ ﷺ أَنَّهُ قَضَى لِلْجَدَّتَيْنِ مِنَ الْمِيرَاثِ بَيْنَهُمَا السُّدُسُ سَوَاءٌ إِسْحَاقُ عَنْ عُبَادَةَ مُرْسَلٌ