بِسْمِ اللَّهِ تَوَكَّلْتُ عَلَى اللَّهِ لَا حَوْلَ وَلَا قُوَّةَ إِلَّا بِاللَّهِ

bismillaahi, tawakkaltu 'alal-laahi, laa hawla wa laa quwwata illaa billaah

In the name of Allah, I place my trust in Allah and there is no might nor power except with Allah. Narrated Anas ibn Malik (RA): The Prophet (ﷺ) said: When a man goes out of his house and say these words, the following will be said to him at that time: "You are guided, defended and protected." The devils will go far from him and another devil will say: How can you deal with a man who has been guided, defended and protected?

Reference: Sahih (Albani). Abu Dawud: 5095