"Say We believe in God and what is revealed to us and what was revealed to Abraham and Ishmael and I`saac and Jacob and the Tribes, and what was entrusted to Moses and Jesus and the prophets from their Lord. We make no distinction between any of them and to Him we have surrendered." (Quran 3: 84)

Allah (The God)

"The God of all is the One God.
There is no god but He." 
(The-Qur’ an, 20:98)

"Allah, there is no God but He. 
Neither slumber seizes Him, nor sleep; 
to Him belongs all that is in the heavens and all that is in the earth.
Who is there who might intercede with Him save with His leave?
He knows what lies before men and what is hidden from them,
whereas they cannot attain to anything of His knowledge 
save what He wills them to attain. 
His Dominion overspreads the heavens and the earth, 
and their upholding wearies Him not,
He is All-High, All-Glorious.
(The Qurán 2:255)

Who is Allah?

What is Tawheed ?

* pbuh - Peace be upon him; It is a Muslim practise to convey prayers of peace whenever the name of Prophet Muhammad (pbuh) and other prophets is taken.

Prophet Muhammad (pbuh)'s Sermon About Ramadan