4:275: Abu Burda: That his father said, The Prophet sent Mu'adh and Abu Musa to Yemen ...
Narrated Abu Burda:
That his father said, "The Prophet sent Mu'adh and Abu Musa to Yemen telling them. 'Treat the people with ease and don't be hard on them; give them glad tidings and don't fill them with aversion; and love each other, and don't differ."