And if you are in doubt as to that which We have revealed to Our servant, then produce a chapter like it and call on your witnesses besides Allah if you are truthful.

And indeed He has revealed to you in the Book that when you hear Allah's communications disbelieved in and mocked at do not sit with them until they enter into some other discourse; surely then you would be like them; surely Allah will gather together the hypocrites and the unbelievers all in hell.

And who is more unjust than he who forges a lie against Allah, or says: It has been revealed to me; while nothing has been revealed to him, and he who says: I can reveal the like of what Allah has revealed? and if you had seen when the unjust shall be in the agonies of death and the angels shall spread forth their hands: Give up your souls; today shall you be recompensed with an ignominious chastisement because you spoke against Allah other than the truth and (because) you showed pride against His communications.

He sends down water from the cloud, then watercourses flow (with water) according to their measure, and the torrent bears along the swelling foam, and from what they melt in the fire for the sake of making ornaments or apparatus arises a scum like it; thus does Allah compare truth and falsehood; then as for the scum, it passes away as a worthless thing; and as for that which profits the people, it tarries in the earth; thus does Allah set forth parables.

And set forth to them parable of the life of this world: like water which We send down from the cloud so the herbage of the earth becomes tangled on account of it, then it becomes dry broken into pieces which the winds scatter; and Allah is the holder of power over all things.

And the chiefs of those who disbelieved from among his people said: He is nothing but a mortal like yourselves who desires that he may have superiority over you, and if Allah had pleased, He could certainly have sent down angels. We have not heard of this among our fathers of yore:

Had We sent down this Quran on a mountain, you would certainly have seen it falling down, splitting asunder because of the fear of Allah, and We set forth these parables to men that they may reflect.

Allah is He Who created seven heavens, and of the earth the like of them; the decree continues to descend among them, that you may know that Allah has power over all things and that Allah indeed encompasses all things in (His) knowledge. GOD created seven universes and the same number of earths. The commands flow among them. This is to let you know that GOD is Omnipotent, and that GOD is fully aware of all things