The Prophet ﷺ said, "If while you are praying, somebody intends to pass in front of you, prevent him; and should he insist, prevent him again; and if he insists again, fight with him (i.e. prevent him violently e.g. pushing him violently), because such a person is (like) a devil."  

قَالَ النَّبِيُّ ﷺ إِذَا مَرَّ بَيْنَ يَدَىْ أَحَدِكُمْ شَىْءٌ وَهُوَ يُصَلِّي فَلْيَمْنَعْهُ فَإِنْ أَبَى فَلْيَمْنَعْهُ فَإِنْ أَبَى فَلْيُقَاتِلْهُ فَإِنَّمَا هُوَ شَيْطَانٌ  

I narrate what I witnesses from Abu Sa'id and heard from him. Abu Sa'id entered upon Marwan and said: I heard the Messenger of Allah ﷺ say: When one of you prays facing any object which conceals him from people, and someone wishes to pass in front of him, he should strike him at his chest; if he refuses (to go), he should fight him; he is only a devil. Abu Dawud said: Sufyan Ath-Thawri said: "A person arrogantly walks in front of me while I am praying, so I stop him, and a weak person passes, so I dont stop him."  

أَبُو صَالِحٍ أُحَدِّثُكَ عَمَّا رَأَيْتُ مِنْ أَبِي سَعِيدٍ وَسَمِعْتُهُ مِنْهُ دَخَلَ أَبُو سَعِيدٍ عَلَى مَرْوَانَ فَقَالَ 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  

[Machine] I heard the Messenger of Allah ﷺ say, "When one of you prays, he should put something in front of him to shield himself from people. If someone intends to pass between his hands, let him push him in his throat. If he refuses, let him fight him, as he is a devil."  

سَمِعْتُ رَسُولَ اللهِ ﷺ يَقُولُ إِذَا صَلَّى أَحَدُكُمْ قَالَ بَهْزٌ إِلَى شَيْءٍ يَسْتُرُهُ مِنَ النَّاسِ فَأَرَادَ أَحَدٌ أَنْ يَجْتَازَ بَيْنَ يَدَيْهِ فَلْيَدْفَعْ فِي نَحْرِهِ فَإِنْ أَبَى فَلْيُقَاتِلْهُ فَإِنَّمَا هُوَ شَيْطَانٌ  

[Machine] The Messenger of Allah ﷺ said, "When one of you stands up to pray, do not let anyone pass in front of him. And if he refuses, let him fight him, for indeed he is a devil."  

قَالَ رَسُولُ اللهِ ﷺ إِذَا قَامَ أَحَدُكُمْ يُصَلِّي فَلَا يَتْرُكْ أَحَدًا يَمُرُّ بَيْنَ يَدَيْهِ فَإِنْ أَبَى فَلْيُقَاتِلْهُ فَإِنَّمَا هُوَ شَيْطَانٌ  

It was narrated from Abu Saeed that the Messenger of Allah ﷺ said: " If anyone of you is praying, he should not let anyone pass in front of him, and if he insists (on passing) then let him fight him." (Using translation from Nasāʾī 757)  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ «إِذَا كَانَ أَحَدُكُمْ يُصَلِّي فَلَا يَدَعْ أَحَدًا يَمُرُّ بَيْنَ يَدَيْهِ فَإِنْ أَبَى فَلْيُقَاتِلْهُ فَإِنَّمَا هُوَ شَيْطَانٌ»  

"إذَا مرَّ المارُّ بينَ يدي أحدِكُمْ وهو في الصَّلاةِ فليدْفَعْه، فإِنْ أبَى فليقاتِلهُ، فإِنّما هُوَ شيطانٌ".  

"إذَا أراد أحدٌ أنْ يَمُرَّ بين يديك وبين سُتْرتك - فارددْه، فإنْ أبَى فادْفعْه فإنْ أبى فقاتْله، فإنّما هو شيطانٌ".