Do not invalidate the prayer by someone passing in front of the praying person; for 'Urwah ibn al-Zubair, may Allah be pleased with him, said that 'Aisha, may Allah be pleased with her, said: "What interrupts the prayer? We said: A woman and a donkey. She said: Indeed, a woman is a bad creature! I have seen myself standing in front of the Messenger of Allah, peace be upon him, like the obstruction of a funeral while he was praying," in Sahih Muslim 1: 366. And from Abu Dharr, may Allah be pleased with him, the Prophet, peace be upon him, said: "Nothing interrupts the prayer if it is between your hands like the back of a saddle or the middle of a saddle," in Musnad Abu 'Awanah 1: 385. And from Abu Umamah, may Allah be pleased with him, the Prophet, peace be upon him, said: "Nothing interrupts the prayer," Al-Haythami said in Majma' al-Zawa'id 2: 62: Narrated by Al-Tabarani in Al-Kabir and its chain is good. And from Abu Sa'id, may Allah be pleased with him, the Prophet, peace be upon him, said: "Nothing interrupts the prayer, and repel as much as you can, for it is only a devil," in Sunan Abu Dawood 1: 191, and he was silent about it, and Al-Tahanawi graded it as good in I'la al-Sunan 5: 65. See: 'Umdat al-Ri'ayah 1: 195.