Abu Dawud Book 2, Hadith Number 718.
Chapter : Not known.
Narated By Abu Sa’id al-Khudri : The Prophet (PBUH) said: Nothing interrupt prayer, but repulse as much as you can anyone who passes in front of you, for he is just a devil.
Partial Translation of Sunan Abu-Dawud, Book 2: Prayer (Kitab Al-Salat): Details of Commencing Prayer