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
The Prophet said, "A faithful believer to a faithful believer is like the bricks of a wall, enforcing each other." While (saying that) the Prophet clasped his hands, by interlacing his fingers.
Sahih Bukhari: Volume 1, Book 8, Number 468