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السيوطي:٢٣٣٩٧a

"مَنْ نَظَرَ إِلَى فُرْجَةٍ فِي صَفّ، فَليَسُدَّها بِنَفْسِهِ، فإِنْ لَمْ يَفْعَلْ فَمَر (فمن) (*) مَارٌّ فَليَتَخَطَّ عَلَى رَقَبَتِهِ فإِنَّهُ لا حُرْمَةَ لَهُ".  

[طب] الطبرانى في الكبير عن ابن عباس

See similar narrations below:

Collected by Ṭabarānī
tabarani:11184ʿAbdullāh b. Mūsá b. Abū ʿUthmān al-Anmāṭī > al-Ḥakam b. Mūsá > Maslamah b. ʿUlay > Ibn Jurayj > ʿAṭāʾ And ʿAmrū b. Dīnār > Ibn ʿAbbās

[Machine] From the Messenger of Allah ﷺ, "Whoever sees something inappropriate in a row, let him rectify it with his own hands. If he cannot, then let him do so with his tongue. And if he cannot, then let him do so with his heart, and that is the weakest of faith."  

الطبراني:١١١٨٤حَدَّثَنَا عَبْدُ اللهِ بْنُ مُوسَى بْنِ أَبِي عُثْمَانَ الْأَنْمَاطِيُّ ثنا الْحَكَمُ بْنُ مُوسَى ثنا مَسْلَمَةُ بْنُ عُلَيٍّ ثنا ابْنُ جُرَيْجٍ عَنْ عَطَاءٍ وَعَمْرُو بْنُ دِينَارٍ عَنِ ابْنِ عَبَّاسٍ

عَنْ رَسُولِ اللهِ ﷺ «مَنْ نَظَرَ إِلَى فُرْجَةٍ فِي صَفٍّ فَلْيَسُدَّها بِنَفْسِهِ فَإِنْ لَمْ يَفْعَلْ فَمَرَّ مَارٌّ فَلْيَتَخَطَّ عَلَى رَقَبَتِهِ فَإِنَّهُ لَا حُرْمَةَ لَهُ»  

tabarani:11214ʿAbdullāh b. Mūsá b. Abū ʿUthmān al-Anmāṭī > al-Ḥakam b. Mūsá > Maslamah b. ʿUlay > Ibn Jurayj > ʿAṭāʾ And ʿAmriw b. Dīnār > Ibn ʿAbbās

[Machine] On the authority of the Messenger of Allah, ﷺ , he said, "Whoever looks at a private part of someone's body, let him cover it with himself. If he does not do so, then he should blind himself with a burning ember. Verily, he has no sanctity."  

الطبراني:١١٢١٤حَدَّثَنَا عَبْدُ اللهِ بْنُ مُوسَى بْنِ أَبِي عُثْمَانَ الْأَنْمَاطِيُّ ثنا الْحَكَمُ بْنُ مُوسَى ثنا مَسْلَمَةُ بْنُ عُلَيٍّ عَنِ ابْنِ جُرَيْجٍ عَنْ عَطَاءٍ وَعَمْرِو بْنِ دِينَارٍ عَنِ ابْنِ عَبَّاسٍ

عَنْ رَسُولِ اللهِ ﷺ قَالَ «مَنْ نَظَرَ إِلَى فُرْجَةِ صَفٍّ فَلْيَسْتُرْها بِنَفْسِهِ فَإِنْ لَمْ يَفْعَلْ فَمَرَّ مَارٌّ عَلَيْهِ فليطأْ عَلَى رَقَبَتِهِ فَإِنَّهُ لَا حُرْمَةَ لَهُ»