`A'isha told that when nomadic Arabs came and asked the Prophet about the last hour, he would look at the youngest of them and say, "If this one lives, he will not become decrepit before your hour comes to you." (Bukhari and Muslim.)
Hadith Referenceمشكوة المصابيح / كتاب الفتن / 5512
Hadith Gradingالألبانی:مُتَّفَقٌ عَلَيْهِ | زبیر علی زئی:متفق عليه
Hadith Takhrij´تحقيق و تخريج: محدث العصر حافظ زبير على زئي رحمه الله` «متفق عليه، رواه البخاري (6511) و مسلم (136 / 2952)»