Muwatta Malik 568

وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ أَبِي الزِّنَادِ، عَنِ الأَعْرَجِ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ ‏ "‏ كُلُّ ابْنِ آدَمَ تَأْكُلُهُ الأَرْضُ إِلاَّ عَجْبَ الذَّنَبِ مِنْهُ خُلِقَ وَفِيهِ يُرَكَّبُ ‏"‏ ‏.‏

Yahya related to me from Malik from Abu'z Zinad from al-Araj from Abu Hurayra that the Messenger of Allah, may Allah bless him and grant him peace, said, "The earth eats all of the son of Adam except the coccyx. He was created from it, and on it he is built

Reference

Muwatta Malik 568

In-book

Book 16, Hadith 49