إِنَّا نَحْنُ نَزَّلْنَا عَلَيْكَ الْقُرْآنَ تَنزِيلًا (23)
(76:23) (O Prophet), indeed We have revealed the Qur'an to you in portions. *27
*27) Though the addressee here apparently is the Holy Prophet (upon whom be peace), the discourse is directed to the disbelievers, who said "Muhammad (upon whom be Allah's peace and blessings) himself composes the Qur'an deliberately piece by piece; had it been from Allah, it would be revealed all at once. At some places on the Qur'an this objection bas been cited and answered (e.g. see E.N.'s 102, 104, 105, 106 of An-Nahl and E.N. 119 of Bani Isra'il), but here Allah has answered it without citing it, saying emphatically: "It is We Ourself Who are sending it down: it is not the composition of Muhammad: and it is We Ourself Who are sending it gradually. That is, it is the requirement of Our wisdom that We should not send down Our message all together in book form, but should send it piece by piece."