And they estimated not Allah with an estimation due unto Him when they said: on no human being hath God sent down aught. Say thou: who sent down the Books wherewith Musa came, a light and a guidance unto mankind, which ye have made into separate parchments. Some of it ye disclose and much thereof ye conceal. And ye were taught that which ye knew not: neither ye nor your fathers. Say thou: Allah, and let them alone, sporting in their vain discourse.