Sunan Abi Dawud 4743
سنن أبي داود#4743Sahihحَدَّثَنَا الْقَعْنَبِيُّ، عَنْ مَالِكٍ، عَنْ أَبِي الزِّنَادِ، عَنِ الأَعْرَجِ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ : " كُلَّ ابْنِ آدَمَ تَأْكُلُ الأَرْضُ إِلاَّ عَجْبَ الذَّنَبِ، مِنْهُ خُلِقَ وَفِيهِ يُرَكَّبُ " .
Abu Hurairah reported the Apostle of AllSah(ﷺ) as saying:Every son of Adam will be devoured by the earth with the exception of the tail-bone from which he was created and from which he will be reconstituted
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:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Shuaib Al ArnautSahih
Zubair Ali ZaiIsnaad Sahih
In-book reference: 42:148