It is narrated from Imam Sha'bi (may Allah have mercy on him) that a man came to Sayyiduna Abdullah bin Amr (may Allah be pleased with them). Other people were also present. He began to step over people's necks to move forward, so the people stopped him. Sayyiduna Abdullah (may Allah be pleased with him) said: Let this man come. He moved forward and sat near him and said: Tell me a hadith that you heard from the Messenger of Allah (peace and blessings be upon him). He said: I heard the Messenger of Allah (peace and blessings be upon him) say: "A Muslim is the one from whose tongue and hand other Muslims are safe, and a Muhajir (emigrant) is the one who leaves what Allah has forbidden."