It is narrated from Abu Salih that Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him) was praying when a man from the family of Abu Mu'ayt began to pass in front of him, so he stopped him. He refused to stop, so Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him) pushed him; he still refused, so he struck him on the chest. In those days Marwan was the governor of Madinah. That man complained about him to Marwan, and Marwan mentioned the matter to Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him). Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him) said that the Messenger of Allah (peace and blessings be upon him) said: "When one of you is praying and someone passes in front of him, let him stop him. If he refuses, let him fight him, for he is a devil." And I was stopping him, and he refused to stop.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 3448