(بِسْمِ اللَّهِ، تَوَكَّلْتُ عَلَى اللَّهِ، وَلَاَ حَوْلَ وَلَا قُوَّةَ إِلاَّ بِاللَّهِ).
Bismil-lah, tawakkaltu AAalal-lah, wala hawla wala quwwata illa billah.
In the name of Allah, I place my trust in Allah, and there is no might nor power except with Allah.
Source
Hisn al-Muslim, no. 16