Evil is that for which they have sold their souls-- that they should deny what Allah has revealed, out of envy that Allah should send down of His grace on whomsoever of His servants He pleases; so they have made themselves deserving of wrath upon wrath, and there is a disgraceful punishment for the unbelievers.

And if Allah should amplify the provision for His servants they would certainly revolt in the earth; but He sends it down according to a measure as He pleases; surely He is Aware of, Seeing, His servants.