Al-Adab Al-Mufrad #1147

Ash-Sha'bi said, "A man came to 'Abdullah ibn 'Amr when there were some people sitting with him. He stepped over them in order to reach him. They stopped him and 'Abdullah said, 'Leave the man.' He approached until he sat with him and then said, 'Tell me something which you heard from the Messenger of Allah, may Allah bless him and grant him peace.' 'Abdullah said, 'I heard the Messenger of Allah, may Allah bless him and grant him peace, say, "A Muslim is the one from whose tongue and hand the Muslims are safe. An emigrant (muhajir) is someone who abandons what Allah has forbidden."'"