2: 163 And your god [ilahakum] is one god [ilahan wahid]; there is no god [ilah] but He[hooa] Most Gracious Most Merciful [al Rahman al Rahim].
3: 18There is no god [Ilah] but He: that is the witness of Allah [Allah] His angels and those endued with knowledge standing firm on justice. There is no god [ilah] but He the Exalted in Power the Wise.
27: 26 "Allah [Allah]! there is no god [Ilah]but He! Lord of the Throne Supreme!"
First Pillar of 'Islam': Faith
There is no god [ilah] worthy of worship except ALLAH [Allah] and Muhammad is his messenger.
La Ilah [god] Illa' [except] Allah, wa [and] Muhammad Rasool' [messenger of] Allah
This declaration of faith is called the Shahada, a simple formula which all the faithful pronounce.
*** Contrary to all the deliberate falsifications by Muhammadan scholars, as can be seen from the Arabic of the Shahada, and numerous other Quranic verses, Allah isNOT GODbut the NAME of a god, just like Jove, Zeus, Venus, etcare names of pagan gods and goddesses in the Greek and Roman pantheon, so was the name Allah who was the supreme deity of the pagan Ka'bapantheon.
Muhammad's pagan father, after all, was called Abd Allah [Slave of Allah], long before Muhammad's alleged revelations ***