Sunan an-Nasa'i, Book 21, Hadith 233 (In-Book) ⓘ
It was narrated from Anas that the Prophet said: "when a person is placed in his grave and his companions depart from him, he hears the sound of their sandals."
أَخْبَرَنَا أَحْمَدُ بْنُ أَبِي عُبَيْدِ اللَّهِ الْوَرَّاقُ، قَالَ حَدَّثَنَا يَزِيدُ بْنُ زُرَيْعٍ، عَنْ سَعِيدٍ، عَنْ قَتَادَةَ، عَنْ أَنَسٍ، أَنَّ النَّبِيَّ صلى الله عليه وسلم قَالَ " إِنَّ الْعَبْدَ إِذَا وُضِعَ فِي قَبْرِهِ وَتَوَلَّى عَنْهُ أَصْحَابُهُ إِنَّهُ لَيَسْمَعُ قَرْعَ نِعَالِهِمْ " .
also referenced under: Hadith 2049 (Reference) & Volume 3, Book 21, Hadith 2051 (DarusSalam)