Sahih Bukhari
Sahih Bukhari Volume 001, Book 002, Hadith Number 010.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 02. Belief
Narated By Abu Musa : Some people asked Allah's Apostle, "Whose Islam is the best? i.e. (Who is a very good Muslim)?" He replied, "One who avoids harming the Muslims with his tongue and hands."