Awn said: When Abdullah bin Mas'ud (may Allah be pleased with him) went out of his house, he would say: "Bismillah, tawakkaltu 'ala Allah, la hawla wa la quwwata illa billah (In the name of Allah; I have put my trust in Allah; there is no might nor power except with Allah)." Muhammad bin Ka'b al-Qurazi said: This is in the Qur'an: "Embark therein, in the name of Allah" [Hud: 41], and He said: "In Allah we have put our trust."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 8857