He says...

He says, "O men, now is an evident proof come unto you from your Lord, and We have sent down unto you manifest light" [Qur'an 4.173]. By manifest light is meant the Qur'an.

Again He says, "O men, now is the apostle come unto you from your Lord; believe, therefore, it will be better for you" [Qur'an 4.168], and again, "But those among them who are well-grounded in knowledge, and faithful, who believe in that which has been sent down unto you, and that which has been sent down unto the prophets before you" [Qur'an 4.160]; and again "God is the witness of the revelation which He has sent down unto you; He sent it down with his special knowledge; the angels are also witness thereof; but God is a sufficient witness" [Qur'an 4.164].