Abu Hurairah reported the Apostle of AllSahﷺ 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.

حَدَّثَنَا الْقَعْنَبِيُّ، عَنْ مَالِكٍ، عَنْ أَبِي الزِّنَادِ، عَنِ الأَعْرَجِ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ : " كُلَّ ابْنِ آدَمَ تَأْكُلُ الأَرْضُ إِلاَّ عَجْبَ الذَّنَبِ، مِنْهُ خُلِقَ وَفِيهِ يُرَكَّبُ " .