Sunan an-Nasa'i 2008
سنن النسائي#2008Sahihأَخْبَرَنَا هَارُونُ بْنُ عَبْدِ اللَّهِ، قَالَ حَدَّثَنَا أَبُو عَامِرٍ، عَنْ عَبْدِ اللَّهِ بْنِ جَعْفَرٍ، عَنْ إِسْمَاعِيلَ بْنِ مُحَمَّدٍ، عَنْ عَامِرِ بْنِ سَعْدٍ، : أَنَّ سَعْدًا، لَمَّا حَضَرَتْهُ الْوَفَاةُ قَالَ : الْحَدُوا لِي لَحْدًا، وَانْصِبُوا عَلَىَّ نَصْبًا كَمَا فُعِلَ بِرَسُولِ اللَّهِ صلى الله عليه وسلم .
It was narrated from 'Amir bin Sa'd that when Sa'd was dying he said:"Make a niche for me in the side of the grave and set up (bricks) over me as was done for the Messenger of Allah
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
In-book reference: 21:191