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السيوطي:٥٩٩٧a

"إِنَّ النُّورَ إِذَا دَخَلَ الصدرَ انْفَسَحَ، قيلَ: هَلْ لِذَلك من عَلَم يُعْرَفُ بهِ؟ قال: نعم. التجافِى عن دار الغُرور، والإِنابةُ إِلى دارِ الخلودِ، والاستعدادُ للموتِ قبلَ نزولِه".  

[ك] الحاكم في المستدرك وتُعُقِّبِ عن ابن مسعود

See similar narrations below:

Collected by Ḥākim
hakim:7863Abū Bakr Muḥammad b. Bālawayh > Muḥammad b. Bishr b. Maṭar > Muḥammad b. Jaʿfar al-Warakānī > ʿAdī b. al-Faḍl > ʿAbd al-Raḥman b. ʿAbdullāh al-Masʿūdī > al-Qāsim b. ʿAbd al-Raḥman from his father > Ibn Masʿūd

[Machine] The Messenger of Allah ﷺ recited, "So whoever Allah wants to guide - He expands his breast to [contain] Islam" [Surah Al-An'am: 125]. Then the Messenger of Allah ﷺ said, "Indeed, when light enters the chest, it expands." It was asked, "O Messenger of Allah, is there any knowledge by which it can be recognized?" He ﷺ said, "Yes, to avoid the abode of deception, to turn towards the abode of eternity, and to prepare for death before its descent." Adi ibn Al-Fadl replied.  

الحاكم:٧٨٦٣حَدَّثَنِي أَبُو بَكْرٍ مُحَمَّدُ بْنُ بَالَوَيْهِ ثَنَا مُحَمَّدُ بْنُ بِشْرِ بْنِ مَطَرٍ ثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ الْوَرَكَانِيُّ حَدَّثَنِي عَدِيُّ بْنُ الْفَضْلِ عَنْ عَبْدِ الرَّحْمَنِ بْنِ عَبْدِ اللَّهِ الْمَسْعُودِيِّ عَنِ الْقَاسِمِ بْنِ عَبْدِ الرَّحْمَنِ عَنْ أَبِيهِ عَنِ ابْنِ مَسْعُودٍ قَالَ

تَلَا رَسُولُ اللَّهِ ﷺ {فَمَنْ يُرِدِ اللَّهُ أَنْ يَهْدِيَهُ يَشْرَحْ صَدْرَهُ لِلْإِسْلَامِ} [الأنعام 125] فَقَالَ رَسُولُ اللَّهِ ﷺ «إِنَّ النُّورَ إِذَا دَخَلَ الصَّدْرَ انْفَسَحَ» فَقِيلَ يَا رَسُولَ اللَّهِ هَلْ لِذَلِكَ مِنْ عِلْمٍ يُعْرَفُ؟ قَالَ «نَعَمْ التَّجَافِي عَنْ دَارِ الْغُرُورِ وَالْإِنَابَةُ إِلَى دَارِ الْخُلُودِ وَالِاسْتِعْدَادِ لِلْمَوْتِ قَبْلَ نُزُولِهِ» عدي بن الفضل ساقط