Kitab al-Fitan · Nu'aym ibn Hammad

Al-Mu'tamir bin Sulaiman told us, on the authority of Laith, on the authority of Mujahid, he said: The Messenger of Allah ﷺ said: “The Hour will not come upon the one who says: There is no god but Allah, and the king wants to blow the trumpet, so if he hears someone say: There is no god but Allah, the last of it will be seventy autumns.”

Abu Huraira reported Allah's Messenger (ﷺ) as saying:Between the two blowings of the trumpet (there would be an interval of forty). They said: Abu Huraira, do you mean forty days? He said: I cannot say anything. They said: Do you mean forty months? He said: I cannot say anything. They said: Do you mean forty years? He said: I cannot say anything. Then Allah would cause the water to, descend from the sky and they (people) will sprout like vegetable. The only thing in a man which would not decay would be one bone (the tailbone) from which the whole frame would be reconstituted on the Day of Resurrection