Musannaf Ibn Abi Shayba 37:306

Abu Mu'awiyah narrated to us, from 'Asim, from Abu 'Uthman, who said: A man came to Hudhayfah and said: "I intend to go out to Basra." He said: "If you must go out, then stay in its outskirts (azwatiha), and do not stay in its center (surratiha)."