It is narrated from Sayyiduna Abdullah bin Amr bin al-As (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "Do you know who is a Muslim?" They said: "Allah and His Messenger know best." The Prophet (peace and blessings be upon him) said: "A Muslim is the one from whose tongue and hand other Muslims are safe." The Prophet (peace and blessings be upon him) said: "Do you know who is a believer?" They said: "Allah and His Messenger know best." The Prophet (peace and blessings be upon him) said: "A believer is the one from whom other believers are safe regarding their lives and wealth, and a migrant is the one who abandons evil and refrains from it."