Have you seen this night of yours? At the end of one hundred years after this none would survive on the surface of the earth (from amount my Companions). Ibn Umar said: People were (not understanding) these words of the Messenger of Allah ﷺ which had been uttered pertaining to one hundred years. Messenger of Allah ﷺ in fact meant (by these words) that on that day none from amongst those who had been living upon the earth (from amongst his Companions) would survive (after one hundred years) and that would be the end of this generation.
صَلَّى بِنَا رَسُولُ اللَّهِ ﷺ ذَاتَ لَيْلَةٍ صَلاَةَ الْعِشَاءِ فِي آخِرِ حَيَاتِهِ فَلَمَّا سَلَّمَ قَامَ فَقَالَ أَرَأَيْتَكُمْ لَيْلَتَكُمْ هَذِهِ فَإِنَّ عَلَى رَأْسِ مِائَةِ سَنَةٍ مِنْهَا لاَ يَبْقَى مِمَّنْ هُوَ عَلَى ظَهْرِ الأَرْضِ أَحَدٌ قَالَ ابْنُ عُمَرَ فَوَهَلَ النَّاسُ فِي مَقَالَةِ رَسُولِ اللَّهِ ﷺ تِلْكَ فِيمَا يَتَحَدَّثُونَ مِنْ هَذِهِ الأَحَادِيثِ عَنْ مِائَةِ سَنَةٍ وَإِنَّمَا قَالَ رَسُولُ اللَّهِ ﷺ لاَ يَبْقَى مِمَّنْ هُوَ الْيَوْمَ عَلَى ظَهْرِ الأَرْضِ أَحَدٌ يُرِيدُ بِذَلِكَ أَنْ يَنْخَرِمَ ذَلِكَ الْقَرْنُ