The Messenger of Allah ﷺ said, "The earth consumes every part of the son of Adam except the tailbone. From it he was created, and from it he will be reassembled."
أن رسول الله ﷺ قال: كل ابن آدم تأكله الأرض، إلا عجب الذنب منه خلق، وفيه يركب.
Malik narrated it in al-Janaiz (49) from Abu Zinad, from Araj, from Abu Hurairah, and he related it. Muslim narrated it in al-Fitan (2955: 142) via the route of Mughira Hizami, from Abu Zinad, with the same chain.