And in no way have they estimated Allah His true estimate as they said, "In no way has Allah sent down anything on any mortal." Say, "Who sent down the Book that Mûsa (Moses) came with (as) a light and a guidance to mankind? You make it into papers, displaying them, and concealing much; and you were taught what you did not know yourselves, nor your fathers." Say, " Allah." Thereafter leave them out, playing in their wading (i.e., plunge in vain discourse).