[Machine] A person used to regularly pray in the mosque and when they died, the Prophet ﷺ missed their presence. He asked, "What happened to the person who used to pray in the mosque?" They informed him that the person had passed away. The Prophet ﷺ said, "Why didn't you inform me? You should have informed me." They replied, "It was during the night." The Prophet ﷺ said, "Show me their grave." He went to the grave and prayed for them, then said, "It is confirmed through this incident, or in another narration, that these graves are filled with darkness upon its inhabitants, and Allah ﷻ illuminates them with my prayers for them."
أَنَّ إِنْسَانًا كَانَ يَقُمُّ الْمَسْجِدَ أَسْوَدَ فمَاتَ أَوْ مَاتَتْ فَفَقَدَهَا النَّبِيُّ ﷺ فَقَالَ مَا فَعَلَ الْإِنْسَانُ الَّذِي كَانَ يَقُمُّ الْمَسْجِدَ؟ قَالَ فَقِيلَ لَهُ مَاتَ قَالَ فَهَلَّا آذَنْتُمُونِي بِهِ؟ فَقَالُوا إِنَّهُ كَانَ لَيْلًا قَالَ فَدُلُّونِي عَلَى قَبْرِهَا قَالَ فَأَتَى الْقَبْرَ فَصَلَّى عَلَيْهَاقَالَ ثَابِتٌ عِنْدَ ذَاكَ أَوْ فِي حَدِيثٍ آخَرَ إِنَّ هَذِهِ الْقُبُورَ مَمْلُوءَةٌ ظُلْمَةً عَلَى أَهْلِهَا وَإِنَّ اللهَ ﷻ يُنَوِّرُهَا بِصَلَاتِي عَلَيْهِمْ