Sahih Muslim 966
Sahih Muslim · Book 11: The Book of Prayer - Funerals · The Lahd (Niche), and setting up bricks over the deceased
'Amir b. Sa'd b. Abu Waqqas told that Sa'd b. Abu Waqqas said during his illness of which he died:
حَدَّثَنَا يَحْيَى بْنُ يَحْيَى ، أَخْبَرَنَا عَبْدُ اللَّهِ بْنُ جَعْفَرٍ الْمِسْوَرِيُّ ، عَنْ إِسْمَاعِيلَ بْنِ، مُحَمَّدِ بْنِ سَعْدٍ عَنْ عَامِرِ بْنِ سَعْدِ بْنِ أَبِي وَقَّاصٍ ، أَنَّ سَعْدَ بْنَ أَبِي وَقَّاصٍ ، قَالَ فِي مَرَضِهِ الَّذِي هَلَكَ فِيهِ الْحَدُوا لِي لَحْدًا وَانْصِبُوا عَلَىَّ اللَّبِنَ نَصْبًا كَمَا صُنِعَ بِرَسُولِ اللَّهِ صلى الله عليه وسلم .
" Make a niche for me in the side of the grave and set up bricks over me as was done in case of Allah's Messenger (ﷺ).