حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنْ زَيْدِ بْنِ أَسْلَمَ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ أَبِي سَعِيدٍ الْخُدْرِيِّ، عَنْ أَبِيهِ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ ‏"‏ إِذَا كَانَ أَحَدُكُمْ يُصَلِّي فَلاَ يَدَعْ أَحَدًا يَمُرُّ بَيْنَ يَدَيْهِ وَلْيَدْرَأْهُ مَا اسْتَطَاعَ فَإِنْ أَبَى فَلْيُقَاتِلْهُ فَإِنَّمَا هُوَ شَيْطَانٌ ‏"‏ ‏.‏

Yahya related to me from Malik from Zayd ibn Aslam from Abd ar-Rahman ibn Abi Said al-Khudri from his father that the Messenger ofAllah, may Allah bless him and grant him peace, said, "Do not letanyone pass in front of you when you are praying. Repel him as much asyou can, and, if he refuses, fight him, for he is only a shaytan." Translation Not Available

Book Ref: Muwatta Imam Malik Book 9 Hadith 365
Web Ref:  Muwatta Imam Malik Book 9 Hadith 36