Abu Abdur Rahman reported: I said to Sa’id ibn Abdul Aziz, may Allah have mercy on him, “O Abu Muhammad, what is this weeping that confronts you in your prayer?” Sa’id said, “O nephew, why do you ask about it?” He said, “O uncle, perhaps Allah will benefit me.” Sa’id said, “I never stood for my prayer but that the image of Hell appeared before me.”
Source: Ḥilyat al-Awliyā’ 8/274
عَنْ أَبِي عَبْدِ الرَّحْمَنِ الْأَسَدِي قَالَ قُلْتُ لِسَعِيدِ بْنِ عَبْدِ الْعَزِيزِ رحمه الله يَا أَبَا مُحَمَّدٍ مَا هَذَا الْبُكَاءُ الَّذِي يَعْرِضُ لَكَ فِي الصَّلَاةِ فَقَالَ يَا ابْنَ أَخِي وَمَا سُؤَالُكَ عَنْ ذَلِكَ قُلْتُ يَا عَمُّ لَعَلَّ اللهَ أَنْ يَنْفَعَنِي فَقَالَ سَعِيدٌ مَا قُمْتُ فِي صَلَاتِي إِلَّا مُثِّلَتْ لِي جَهَنَّمُ
8/274 حلية الأولياء وطبقات الأصفياء