Say: Whoever is the enemy of Jibreel-- for surely he revealed it to your heart by Allah's command, verifying that which is before it and guidance and good news for the believers.

In their histories there is certainly a lesson for men of understanding. It is not a narrative which could be forged, but a verification of what is before it and a distinct explanation of all things and a guide and a mercy to a people who believe.

And those who disbelieve say: By no means will we believe in this Quran, nor in that which is before it; and could you see when the unjust shall be made to stand before their Lord, bandying words one with another! Those who were reckoned weak shall say to those who were proud: Had it not been for you we would certainly have been believers.