It was narrated from Abu Saeed Al-Khudri that he was praying and a son of Marwan wanted to pass in front of him. He tried to stop him but he did not go back, so he hit him. The boy went out crying and went to Marwan and told him (what had happened). Marwan said to Abu Saeed: “Why did you hit your brother’s son?” He said: “I did not hit him, rather I hit the Shaan. I heard the Messenger of Allah صلی اللہ علیہ وآلہ وسلم say: ‘If one of you is praying and someone wants to pass in front of him, let him try to stop him as much as he can, and if he persists then let him fight him, for he is a devil.” (Sahih)