«بِسْمِ اللَّهِ، اللَّهُمَّ جَنِّبْنَا الشَّيْطَانَ، وَجَنِّبِ الشَّيْطَانَ مَا رَزَقْتَنَا».
With the Name of Allah. O Allah, keep the Devil away from us, and keep the Devil away from that which You provide for us.
SourceAl-Bukhari 6/141, Muslim 2/1028.