Musannaf Ibn Abi Shaybah

Hazrat Awn bin Abdullah narrates that a man came to Hazrat Abdullah bin Masood (may Allah be pleased with him) and said: I intend to travel, so please advise me. He replied: When you set out for your journey, say these words: I begin with the name of Allah, Allah is sufficient for me, I have placed my trust in Allah. When you say, "I begin with the name of Allah," an angel will say, "You have been guided." And when you say, "Allah is sufficient for me," the angel will say, "You have been protected." And when you say, "I have placed my trust in Allah," the angel will say, "You have been taken care of."