«ما بين النفختين أربعون ثم ينزل الله من السماء ماء فينبتون كما ينبت البقل وليس من الإنسان شيء إلا يبلى إلا عظم واحد وهو: عجب الذنب منه خلق ومنه يركب يوم القيامة»
The Prophet (peace and blessings be upon him) said:
"Between the two blowings of the Trumpet there is an interval of forty. Then Allah will send down water from the sky, and people will sprout as vegetation sprouts. There is nothing of a human being that does not decay, except one bone, and that is the end of the spine (the tailbone); from it he was created, and from it the whole creature will be reassembled on the Day of Resurrection."
Hadith Referenceصحیح الجامع الصغیر / حرف الميم / 5585