A child will be born to the believer and he will not die for forty years after the emergence of the Beast

It is narrated from Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "The emergence of the Beast of the Earth (Dabbat al-Ard) will be after the rising of the sun from its place of setting. When it emerges, it will kill Iblis while he is in prostration. After that, the believers will live on earth in ease and comfort for forty years; whatever they wish for will be given to them and they will find it. There will be neither oppression nor injustice, and all things will have submitted to the Lord of the Worlds, willingly or unwillingly, to the extent that even the beasts of prey and the birds will be subdued (even if unwillingly), so much so that no beast of prey will harm any animal or bird. A child will be born to a believer, and he will not die without completing forty years after the emergence of the Beast of the Earth. Then death will return among them, and they will remain in that state for as long as Allah wills. Then death will come swiftly among the believers until no believer remains. Then the disbelievers will say: We used to be in awe of the believers, and now none of them remains, and now no repentance will be accepted from us either; so what is wrong with us that we should not commit indecency with one another like animals?! So they will fall upon one another in the roads like cattle (committing indecency). Then one of them will commit indecency with his mother, sister and daughter in the middle of the road; when one finishes and gets up, another will mount her, and no one will object to it or stop it. On that day the best of them will be the one who says: If you had done this away from the road, it would have been better. They will remain in this state until none of the offspring born of marriage remains, and all over the face of the earth only the illegitimate offspring will remain. They will remain in this state for as long as Allah wills. Then Allah Almighty will make the wombs of women barren for thirty years; no woman will give birth and there will be no child on earth. All of them will be the worst of people and the offspring of fornication, and it is upon them that the Hour will be established."
The hadith of Muhammad bin Thabit bin Aslam al-Bunani is very precious among the narrations of the people of Basrah and the children of the Tabi'un; however, Abd al-Wahhab bin Husayn is unknown (majhul).

It is narrated from al-Ahnaf bin Qays; he said: I was in Madinah when suddenly my eyes fell on a man from whom people would run away as soon as they saw him. I asked: Who are you? He said: I am Abu Dharr, the Companion of the Messenger of Allah (peace and blessings be upon him). I said: Why do people run away from you? He said: I forbid them from hoarding treasures just as the Messenger of Allah (peace and blessings be upon him) used to forbid them. I said: Today our stipends and incomes have increased greatly; do you fear anything for us? He said: "Not today, but soon these stipends will become the price of your religion. So when they become the price of your religion, leave them and keep away from them."
This hadith has a sahih (authentic) chain of narration, but the two Shaykhs did not record it.