The Prophet (ﷺ) said, "Between the two blowings of the Trumpet there will be forty." The people said O Huraira ! Forty days?" I refused to reply. They said, Forty years? I refused to reply. They said, "Forty months?" I refused to reply and added: " Everything of a human body will waste away or perish or decay except the last coccyx bone (of the tail) and from that bone Allâh will reconstruct the whole body." [6:338-0.B]