The Messenger has believed in what was revealed to him from his Lord, and [so have] the believers. All of them have believed in Allah and His angels and His books and His messengers, [saying], “We make no distinction between any of His messengers.” And they say, “We hear and we obey. [We seek] Your forgiveness, our Lord, and to You is the [final] destination.” (2:285)
This is the Book about which there is no doubt, a guidance for those conscious of Allah – (2:2)
And when you, [O Muhammad], do not bring them a sign, they say, “Why have you not contrived it?” Say, “I only follow what is revealed to me from my Lord. This [Qur’an] is enlightenment from your Lord and guidance and mercy for a people who believe.”
And it is not for any human being that Allah should speak to him except by revelation or from behind a partition or that He sends a messenger to reveal, by His permission, what He wills. Indeed, He is Most High and Wise.