أَعُوذُ بِكَلِمَاتِ اللَّهِ التَّامَّاتِ مِنْ شَرِّ مَا خَلَقَ
Transliteration
A'udhu bikalimatillahit-tammati min sharri ma khalaq
English meaning
I seek refuge in the perfect words of Allah from the evil of that which He has created.
When is it recited?
Recited 3 times in the evening.
Its virtue
Whoever says this 3 times in the evening, nothing will harm them that night.
Source
Muslim, Dhikr 55, 2708