When any one of you prays he should not let anyone pass in front of him (if there is no sutra), and should try to turn him away as far as possible, but if he refuses to go, he should turn him away forcibly for he is a devil.  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ إِذَا كَانَ أَحَدُكُمْ يُصَلِّي فَلاَ يَدَعْ أَحَدًا يَمُرُّ بَيْنَ يَدَيْهِ وَلْيَدْرَأْهُ مَا اسْتَطَاعَ فَإِنْ أَبَى فَلْيُقَاتِلْهُ فَإِنَّمَا هُوَ شَيْطَانٌ  

I narrate to you what I heard and saw from Abu Sa'id al-Khudri: One day I was with Abu Sa'id and he was saying prayer on Friday turning to a thing which concealed him from the people when a young man from Banu Mu'ait came there and he tried to pass in front of him; he turned him back by striking his chest. He looked about but finding no other way to pass except in front of Abu Sa'id, made a second attempt. He (Abu Sa'id) turned him away by Striking his chest more vigorously than the first stroke. He stood up and had a scuffle with Abu Sa'id. Then the people gathered there He came out and went to Marwan and complained to him what had happened to him. Abu Sa'id too came to Marwan. Marwin said to him: What has happened to you and the son of your brother that he came to complain against you? Abu Sa'id said: I heard from the Messenger of Allah ﷺ saying: When any one of you prays facing something which conceals him from people and anyone tries to pass in front of him, he should be turned away, but if he refuses, he should be forcibly restrained from it, for he is a devil.  

بَيْنَمَا أَنَا وَصَاحِبٌ لِي نَتَذَاكَرُ حَدِيثًا إِذْ قَالَ أَبُو صَالِحٍ السَّمَّانُ أَنَا أُحَدِّثُكَ مَا سَمِعْتُ مِنْ أَبِي سَعِيدٍ وَرَأَيْتُ مِنْهُ قَالَ بَيْنَمَا أَنَا مَعَ أَبِي سَعِيدٍ يُصَلِّي يَوْمَ الْجُمُعَةِ إِلَى شَىْءٍ يَسْتُرُهُ مِنَ النَّاسِ إِذْ جَاءَ رَجُلٌ شَابٌّ مِنْ بَنِي أَبِي مُعَيْطٍ أَرَادَ أَنْ يَجْتَازَ بَيْنَ يَدَيْهِ فَدَفَعَ فِي نَحْرِهِ فَنَظَرَ فَلَمْ يَجِدْ مَسَاغًا إِلاَّ بَيْنَ يَدَىْ أَبِي سَعِيدٍ فَعَادَ فَدَفَعَ فِي نَحْرِهِ أَشَدَّ مِنَ الدَّفْعَةِ الأُولَى فَمَثَلَ قَائِمًا فَنَالَ مِنْ أَبِي سَعِيدٍ ثُمَّ زَاحَمَ النَّاسَ فَخَرَجَ فَدَخَلَ عَلَى مَرْوَانَ فَشَكَا إِلَيْهِ مَا لَقِيَ قَالَ وَدَخَلَ أَبُو سَعِيدٍ عَلَى مَرْوَانَ فَقَالَ لَهُ مَرْوَانُ مَا لَكَ وَلاِبْنِ أَخِيكَ جَاءَ يَشْكُوكَ فَقَالَ أَبُو سَعِيدٍ سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ إِذَا صَلَّى أَحَدُكُمْ إِلَى شَىْءٍ يَسْتُرُهُ مِنَ النَّاسِ فَأَرَادَ أَحَدٌ أَنْ يَجْتَازَ بَيْنَ يَدَيْهِ فَلْيَدْفَعْ فِي نَحْرِهِ فَإِنْ أَبَى فَلْيُقَاتِلْهُ فَإِنَّمَا هُوَ شَيْطَانٌ  

When any one of you prays, he should not allow anyone to pass before him, and if he refuses, he should be then forcibly resisted, for there is a devil with him.  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ إِذَا كَانَ أَحَدُكُمْ يُصَلِّي فَلاَ يَدَعْ أَحَدًا يَمُرُّ بَيْنَ يَدَيْهِ فَإِنْ أَبَى فَلْيُقَاتِلْهُ فَإِنَّ مَعَهُ الْقَرِينَ  

This hadith has been narrated by Ibn Umar by another chain of transmitters.  

سَمِعْتُ ابْنَ عُمَرَ يَقُولُ إِنَّ رَسُولَ اللَّهِ ﷺ قَالَ بِمِثْلِهِ  

If anyone who passes in front of a man who is praying knew the responsibility he incurs, he would stand still forty (years) rather than to pass in front of him Abu Nadr said: I do not know whether he said forty days or months or years.  

سَمِعَ مِنْ رَسُولِ اللَّهِ ﷺ فِي الْمَارِّ بَيْنَ يَدَىِ الْمُصَلِّي قَالَ 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 قَالَ أَرْبَعِينَ يَوْمًا أَوْ شَهْرًا أَوْ سَنَةً  

This hadith has been narrated from Abu Juhaim Ansari by another chain of transmitters.  

سَمِعْتَ النَّبِيَّ ﷺ يَقُولُ فَذَكَرَ بِمَعْنَى حَدِيثِ مَالِكٍ