Sayyiduna Abdullah bin Amr bin al-As (may Allah be pleased with them both) said that the Messenger of Allah (peace and blessings be upon him) said: "The Muslim is the one from whose tongue and hand the other Muslims are safe, and the emigrant (muhajir) is the one who refrains from what Allah has forbidden."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الشهادات / 20755