بِسْمِ اللَّهِ الَّذِي لَا يَضُرُّ مَعَ اسْمِهِ شَيْءٌ فِي الْأَرْضِ وَلَا فِي السَّمَاءِ وَهُوَ السَّمِيعُ الْعَلِيمُ
Purpose Seek protection in Allah's name from harm.
When to Use Read this three times in the morning and evening.
Source Sunan Abi Dawud and Jami at-Tirmidhi

Transliteration

Bismillahilladhi la yadurru ma`a ismihi shay`un fil-ardi wa la fis-sama`i wa huwas-sami`ul-`alim.

Meaning

In the name of Allah, with whose name nothing on earth or in heaven can cause harm, and He is the All-Hearing, All-Knowing.