عَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ: ((إِذَا كَانَ أَحَدُكُمْ يُصَلِّي فَلَا يَدَعْ أَحَدًا يَمُرُّ بَيْنَ يَدَيْهِ، وَلْيَدْرَأْهُ مَا اسْتَطَاعَ، فَإِنْ أَبَى فَلْيُقَاتِلْهُ، فَإِنَّمَا هُوَ شَيْطَانٌ))
Sayyiduna Abu Sa'id Khudri, may Allah be pleased with him, narrates that the Messenger of Allah, peace and blessings be upon him, said: When any one of you is performing prayer, he should not allow anyone to pass in front of him, and he should stop him as much as he can. If that person refuses (to stop), then he should fight him, for he is a devil.