Sunan Ibn Majah Book 34, Hadith 60
“When a man goes out of the door of his house, there are two angels with him who are appointed over him. If he says Bismillah (in the Name of Allah) they say: ‘You have been guided.’ If he says La hawla wa la quwwata illa billah (there is no power and no strength except with Allah), they say: ‘You are protected.’ If he says, Tawwakaltu ‘ala Allah (I have my trust in Allah), they say: ‘You have been taken care of.’ Then his two Qarins (satans) come to him and they (the two angels) say: ‘What do you want with a man who has been guided, protected and taken care of?’”
“Bismillah, la hawla wa la quwwata illa billah, at-tuklanu ‘ala Allah (In the Name of Allah, there is no power and strength except with Allah, and trust is placed in Allah).”
“When a man enters his house, and remembers Allah when he enters and when he eats, Satan says: ‘You have no place to stay and no supper.’ If he enters his house and does not remember Allah upon entering, Satan says: ‘You have found a place to stay.’ And if he does not remember Allah when he eats, (Satan) says: ‘You have found a place to stay and supper.’”