Sunan an-Nasa'i, Hadith 2008 ⓘ
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."
أَخْبَرَنَا 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 .
also referenced under: Book 21, Hadith 192 (In-Book) & Volume 3, Book 21, Hadith 2010 (DarusSalam)