Anas b. Malik reported that a person asked Allah's Apostle (ﷺ):When would the Last Hour come? Thereupon Allah's Messenger (way peace be upon him) kept quiet for a while. Then looked at a young boy in his presence belonging to the tribe of Azd Shanu'a and he said: If this boy lives he would not grow very old till the Last Hour would come to you. Anas said that this young boy was of our age during those days.
وَحَدَّثَنِي حَجَّاجُ بْنُ الشَّاعِرِ، حَدَّثَنَا سُلَيْمَانُ بْنُ حَرْبٍ، حَدَّثَنَا حَمَّادٌ، - يَعْنِي ابْنَ زَيْدٍ - حَدَّثَنَا مَعْبَدُ بْنُ هِلاَلٍ الْعَنَزِيُّ، عَنْ أَنَسِ بْنِ مَالِكٍ، أَنَّ رَجُلاً، سَأَلَ النَّبِيَّ صلى الله عليه وسلم قَالَ مَتَى تَقُومُ السَّاعَةُ قَالَ فَسَكَتَ رَسُولُ اللَّهِ صلى الله عليه وسلم هُنَيْهَةً ثُمَّ نَظَرَ إِلَى غُلاَمٍ بَيْنَ يَدَيْهِ مِنْ أَزْدِ شَنُوءَةَ فَقَالَ " إِنْ عُمِّرَ هَذَا لَمْ يُدْرِكْهُ الْهَرَمُ حَتَّى تَقُومَ السَّاعَةُ " . قَالَ قَالَ أَنَسٌ ذَاكَ الْغُلاَمُ مِنْ أَتْرَابِي يَوْمَئِذٍ .
Muslim
The Book of Tribulations and Portents of the Last Hour • Hadith 172