It is narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "When one of you is praying, let him not allow anyone to pass in front of him. If he refuses, let him fight him, for he has his qarin (companion devil) with him."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 13516