لَا حَوْلَ وَلَا قُوَّةَ إِلَّا بِاللهِ
Laa hawla wa laa quwwata ‘illaa billaah
There is no power and no might except by Allah. The Messenger of Allah (صلى الله عليه وسلم (said to me, “Shall I not guide you to a treasure from the treasures of Jannah?” I said: “Yes, O Messenger of Allah!” Thereupon he (صلى الله عليه وسلم (said, “(Recite) ‘Laa hawla wa la quwwata ‘illa billaah'”
[Bukhari and Muslim]