And the Noble Prophet (peace and blessings be upon him) said: In the human body there is a bone which the earth never consumes. From it, a person will be reassembled and raised on the Day of Resurrection. The people asked: Which bone is that? The Noble Prophet (peace and blessings be upon him) said: The backbone.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 8180