Sahih al-Bukhari 6735
Sahih al-Bukhari · Book 85: Laws of Inheritance (Al-Faraa'id) · The inheritance of one’s grandchild
Narrated Ibn `Abbas:
حَدَّثَنَا مُسْلِمُ بْنُ إِبْرَاهِيمَ ، حَدَّثَنَا وُهَيْبٌ ، حَدَّثَنَا ابْنُ طَاوُسٍ ، عَنْ أَبِيهِ ، عَنِ ابْنِ عَبَّاسٍ ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " أَلْحِقُوا الْفَرَائِضَ بِأَهْلِهَا فَمَا بَقِيَ فَهْوَ لأَوْلَى رَجُلٍ ذَكَرٍ " .
Allah's Messenger (ﷺ) said, "Give the Fara'id (shares prescribed in the Qur'an) to those who are entitled to receive it; and whatever remains, should be given to the closest male relative of the deceased.'