AND [as for] the believers, both men and women they are close unto one another: they [all] enjoin the doing of what is right and forbid the doing of what is wrong, and are constant in prayer, and render the purifying dues, and pay heed unto God and His Apostle. It is they upon whom God will bestow His grace: verily, God is almighty, wise!
At-Tauba (The Repentance) Verse 71
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."
Volume 1, Book 2, Number 10