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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
ibnmajah:2722 – Abū Bakr b. Abū Shaybah > Shabābah > Yūnus b. Abū Isḥāq > Abū Isḥāq > ʿAmr b. Maymūn > Maʿqil b. Yasār al-Muzanī

“I heard the Prophet ﷺ when a case was brought to him which involved the share of a grandfather. He gave him one third, or one sixth.”  

ابن ماجة:٢٧٢٢ – حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ حَدَّثَنَا شَبَابَةُ حَدَّثَنَا يُونُسُ بْنُ أَبِي إِسْحَاقَ عَنْ أَبِي إِسْحَاقَ عَنْ عَمْرِو بْنِ مَيْمُونٍ عَنْ مَعْقِلِ بْنِ يَسَارٍ الْمُزَنِيِّ قَالَ

سَمِعْتُ النَّبِيَّ ﷺ أُتِيَ بِفَرِيضَةٍ فِيهَا جَدٌّ فَأَعْطَاهُ ثُلُثًا أَوْ سُدُسًا  

See similar narrations below:

Collected by Ṭabarānī
tabarani:17734 – ʿUbayd b. Ghannām And ʿAbdān b. Aḥmad > Abū Bakr b. Abū Shaybah > Shabābah b. Sawwār > Yūnus b. Abū Isḥāq from his father > ʿAmr b. Maymūn > Maʿqil b. Yasār al-Muzanī

“I heard the Prophet ﷺ when a case was brought to him which involved the share of a grandfather. He gave him one third, or one sixth.” (Using translation from Ibn Mājah 2722)  

الطبراني:١٧٧٣٤ – حَدَّثَنَا عُبَيْدُ بْنُ غَنَّامٍ وَعَبْدَانُ بْنُ أَحْمَدَ قَالَا ثنا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ ثنا شَبَابَةُ بْنُ سَوَّارٍ ثنا يُونُسُ بْنُ أَبِي إِسْحَاقَ عَنْ أَبِيهِ عَنْ عَمْرِو بْنِ مَيْمُونٍ عَنْ مَعْقِلِ بْنِ يَسَارٍ الْمُزَنِيِّ قَالَ

سَمِعْتُ النَّبِيَّ ﷺ «أُتِيَ بِفَرِيضَةٍ فِيهَا جَدٌّ فَأَعْطَاهُ ثُلُثَا أَوْ سُدُسًا»