Allah the most high said:Verily, We, it is We Who have sent down the Dhikr (i.e. the Qur’ān) and…

Allah the most high said:

Verily, We, it is We Who have sent down the Dhikr (i.e. the Qur’ān) and surely We will guard it (from corruption).

{Sūrah Al-Hijr 15:9}