VERILY, [O you who believe in Me,] this community of yours is one single community, since I am the Sustainer of you all: worship, then, Me [alone]!
Al-Anbiya (The Prophets) Verse 92
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