The Prophet ﷺ said, (what is ascribed to him in the following Hadith): Narrated Abu Salih As-Samman: I saw Abu Saʿid Al-Khudri praying on a Friday, behind something which acted as a Sutra. A young man from Bani Abi Mu'ait [??] , wanted to pass in front of him, but Abu Saʿid repulsed him with a push on his chest. Finding no alternative he again tried to pass but Abu Saʿid pushed him with a greater force. The young man abused Abu Saʿid and went to Marwan and lodged a complaint against Abu Saʿid and Abu Saʿid followed the young man to Marwan who asked him, "O Abu Saʿid! What has happened between you and the son of your brother?" Abu Saʿid said to him, "I heard the Prophet ﷺ saying, 'If anybody amongst you is praying behind something as a Sutra and somebody tries to pass in front of him, then he should repulse him and if he refuses, he should use force against him for he is a Shaitan (a Satan).' "  

قَالَ النَّبِيُّ ﷺ وَحَدَّثَنَا آدَمُ بْنُ أَبِي إِيَاسٍ قَالَ حَدَّثَنَا سُلَيْمَانُ بْنُ الْمُغِيرَةِ قَالَ حَدَّثَنَا حُمَيْدُ بْنُ هِلاَلٍ الْعَدَوِيُّ قَالَ حَدَّثَنَا أَبُو صَالِحٍ السَّمَّانُ قَالَ رَأَيْتُ أَبَا سَعِيدٍ الْخُدْرِيَّ فِي يَوْمِ جُمُعَةٍ يُصَلِّي إِلَى شَىْءٍ يَسْتُرُهُ مِنَ النَّاسِ فَأَرَادَ شَابٌّ مِنْ بَنِي أَبِي مُعَيْطٍ أَنْ يَجْتَازَ بَيْنَ يَدَيْهِ فَدَفَعَ أَبُو سَعِيدٍ فِي صَدْرِهِ فَنَظَرَ الشَّابُّ فَلَمْ يَجِدْ مَسَاغًا إِلاَّ بَيْنَ يَدَيْهِ فَعَادَ لِيَجْتَازَ فَدَفَعَهُ أَبُو سَعِيدٍ أَشَدَّ مِنَ الأُولَى فَنَالَ مِنْ أَبِي سَعِيدٍ ثُمَّ دَخَلَ عَلَى مَرْوَانَ فَشَكَا إِلَيْهِ مَا لَقِيَ مِنْ أَبِي سَعِيدٍ وَدَخَلَ أَبُو سَعِيدٍ خَلْفَهُ عَلَى مَرْوَانَ فَقَالَ مَا لَكَ وَلاِبْنِ أَخِيكَ يَا أَبَا سَعِيدٍ قَالَ سَمِعْتُ النَّبِيَّ ﷺ يَقُولُ إِذَا صَلَّى أَحَدُكُمْ إِلَى شَىْءٍ يَسْتُرُهُ مِنَ النَّاسِ فَأَرَادَ أَحَدٌ أَنْ يَجْتَازَ بَيْنَ يَدَيْهِ فَلْيَدْفَعْهُ فَإِنْ أَبَى فَلْيُقَاتِلْهُ فَإِنَّمَا هُوَ شَيْطَانٌ  

that Zaid bin Khalid sent him to Abi Juhaim to ask him what he had heard from Messenger of Allah ﷺ about a person passing in front of another person who was praying. Abu Juhaim replied, "Messenger of Allah ﷺ said, 'If the person who passes in front of another person in prayer knew the magnitude of his sin he would prefer to wait for 40 (days, months or years) rather than to pass in front of him." Abu An-Nadr said, "I do not remember exactly whether he said 40 days, months or years."  

سَمِعَ مِنْ رَسُولِ اللَّهِ ﷺ فِي الْمَارِّ بَيْنَ يَدَىِ الْمُصَلِّي فَقَالَ أَبُو جُهَيْمٍ قَالَ رَسُولُ اللَّهِ ﷺ لَوْ يَعْلَمُ الْمَارُّ بَيْنَ يَدَىِ الْمُصَلِّي مَاذَا عَلَيْهِ لَكَانَ أَنْ يَقِفَ أَرْبَعِينَ خَيْرًا لَهُ مِنْ أَنْ يَمُرَّ بَيْنَ يَدَيْهِ قَالَ أَبُو النَّضْرِ لاَ أَدْرِي أَقَالَ أَرْبَعِينَ يَوْمًا أَوْ شَهْرًا أَوْ سَنَةً