Hazrat Ka'b narrates that when a person leaves his house, many devils greet him. But when he says: "I leave the house in the name of Allah," the angels say: "You have been guided." And when that person says: "I put my trust in Allah," the angels say: "You have been sufficed." And when that person says: "The power to avoid sins and to worship comes only from Allah," the angels say: "You have been protected." Then the devils say to each other: "How can you overpower a person who has been sufficed, guided, and protected?"