The Prophet ﷺ said: I hope my community will not fail to maintain their position in the sight of their Lord if He delays them half a day. Sa'd was asked: How long is half a day? He said: It is five hundred years.  

أَنَّ النَّبِيَّ ﷺ قَالَ إِنِّي لأَرْجُو أَنْ لاَ تُعْجِزَ أُمَّتِي عِنْدَ رَبِّهَا أَنْ يُؤَخِّرَهُمْ نِصْفَ يَوْمٍ قِيلَ لِسَعْدٍ وَكَمْ نِصْفُ يَوْمٍ قَالَ خَمْسُمِائَةِ سَنَةٍ  

The Prophet ﷺ said: I hope my community will not fail to maintain their position in the sight of their Lord if He delays them half a day. Sa'd was asked: How long is half a day? He said: It is five hundred years. (Using translation from Abū Dāʾūd 4350)  

عَنِ النَّبِيِّ ﷺ أَنَّهُ قَالَ إِنِّي لأرْجُو أَنْ لَا تَعْجِزَ أُمَّتِي عِنْدَ رَبِّي أَنْ يُؤَخِّرَهُمْ نِصْفَ يَوْمٍ فَقِيلَ لِسَعْدٍ وَكَمْ نِصْفُ يَوْمٍ؟ قَالَ خَمْسُ مِائَةِ سَنَةٍ