No just estimate of Allah do they make when they say : " Nothing doth Allah send down to man ( by way of revelation ) " Say : " Who then sent down the Book which Moses brought ? - a light and guidance to man : But ye make it into ( separate ) sheets for show , while ye conceal much ( of its contents ) : therein were ye taught that which ye knew not- neither ye nor your fathers . " Say : " Allah ( sent it down ) " : Then leave them to plunge in vain discourse and trifling .