Some people asked Allah's Messenger (ﷺ), "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."
Sahih al-Bukhari Book 2, Hadith 4
← Previous Hadith The Prophet (ﷺ) said, "A Muslim is the one who avoids harming Muslims with his tongue and hands. And a Muhajir (emigrant) is the one who gives up (abandons) all what Allah has forbidden."

Sahih al-Bukhari Book 2, Hadith 3 Next Hadith → A man asked the Prophet (ﷺ) , "What sort of deeds or (what qualities of) Islam are good?" The Prophet (ﷺ) replied, 'To feed (the poor) and greet those whom you know and those whom you do not Know (See Hadith No. 27).

Sahih al-Bukhari Book 2, Hadith 5