Leaving the Home
بِسْمِ اللَّهِ، تَوَكَّلْتُ عَلَى اللَّهِ، وَلَا حَوْلَ وَلَا قُوَّةَ إِلَّا بِاللَّهِ
Bismillah, tawakkaltu 'alallah, wa la hawla wa la quwwata illa billah.
In the name of Allah. I rely upon Allah. There is no power and no strength except with Allah.
What it means
You step out of the one place you control into a day you do not. The dua puts your reliance in the right place and admits, in its last phrase, that you cannot move or manage anything except by Allah enabling it.
When and how
Say it once as you leave, every time you go out, not only for long trips.
Its virtue
The Prophet ﷺ said that whoever says this on leaving his house is told: you have been guided, you have been taken care of, you have been protected, and Shaytan turns away from him, reported in Sunan Abi Dawud 5095 and Jami at-Tirmidhi 3426.
Source
Abu Dawud 5095; At-Tirmidhi 3426sahih