ذِكْرُ الْخَبَرِ الْمُدْحِضِ قَوْلَ مَنْ زَعَمَ أَنَّ الْإِنْسَانَ إِذَا مَاتَ بَلِيَ مِنْهُ كُلُّ شَيْءٍ
There is a bone in the human being which the earth would never consume and it is from this that new bodies would be reconstituted (on the Day of Resurrection). They said: Messenger of Allah, which bone is that? Thereupon he said: It is the spinal bone. (Using translation from Muslim 2955c)
وَقَالَ رَسُولُ اللَّهِ ﷺ «فِي الْإِنْسَانِ عَظْمٌ لَا تَأْكُلُهُ الْأَرْضُ أَبَدًا مِنْهُ يُرَكَّبُ يَوْمَ الْقِيَامَةِ» قَالُوا وَأَيُّ عَظْمٍ هُوَ يَا رَسُولَ اللَّهِ؟ قَالَ «عَجْبُ الذَّنَبِ»