The Messenger of Allah ﷺ said, "In every human being there is a bone that the earth will never consume, and from it he will be reassembled on the Day of Resurrection."They asked, "Which bone is it, Messenger of Allah?"He replied, "The tailbone."
قال رسول الله ﷺ: إن في الإنسان عظما لا تأكله الأرض أبدا، فيه يركب يوم القيامة. قالوا: أي عظم هو يا رسول الله؟ قال: عجب الذنب.
Muslim narrated it in the Book of Tribulations (2955:143) from Muhammad bin Rafi, who said, Abdul-Razzaq narrated to us, who said, Mamar narrated to us, from Hammam bin Munabbih, who said, this is what Abu Hurairah narrated to us from the Messenger of Allah ﷺ, and he mentioned several hadiths, including this one.