Not to go on a journey alone...

465. A number of our companions, from Ahmad Bin Muhammad Bin Khalid, from his father, from the one whom he mentioned: Abu Al-Hassan Musa عليه الصلاة والسلام has narrated from his عليه الصلاة والسلام father عليه الصلاة والسلام, from his عليه الصلاة والسلام grandfather عليه الصلاة والسلام regarding the will of the Rasool Allah صلى الله عليه وعلى آله وسلم to Ali عليه الصلاة والسلام: ‘Do not go out alone on a journey for the Satan (la) would be with the loner, and he (la) is (also) with the two but further away. O Ali عليه الصلاة والسلام! If the man travels alone he is misguided, and two are (also) misguided, and the three is a group’. He (the narrator) said, ‘And some of them are reporting: ‘For travelling’.