Narrated Abu Musa: Some people asked Allah's Apostle, "Whose Islam is the best? i.e. (Who is a very good Muslim)?" the Prophet salallahu 'alaihi wassalam replied, "One who avoids harming the Muslims with his tongue and hands." [Hadith from the Translation of Sahih Bukhari, Book 2: Belief Volume 1, Hadith Number 11].