﴿ وَلَوْ نَزَّلْنَا عَلَيْكَ كِتَٰبًۭا فِى قِرْطَاسٍۢ فَلَمَسُوهُ بِأَيْدِيهِمْ لَقَالَ ٱلَّذِينَ كَفَرُوٓا۟ إِنْ هَٰذَآ إِلَّا سِحْرٌۭ مُّبِينٌۭ ﴾

“But even if we had sent down unto thee [O Prophet] a writing on paper, and they had touched it with their own hands - those who are bent on denying the truth would indeed have said, "This is clearly nothing but a deception!"”

(Had we sent down unto thee (Muhammad) (actual) writing upon parchment�) [6:7]. Said al-Kalbi: �The idolaters of Mecca said: �O Muhammad, by Allah we will not believe until you bring us a book from Allah along with four angels with it, bearing witness that it is from Allah and that you are His messenger�, and so this verse was revealed�.