And when the decree was: they did not see anything of that as a sign nor did they believe, He referred to it or to His saying, the Most High, at the beginning of the Surah: "Indeed, they have denied" [Ash-Shu'ara: 6]. The verse "And if We had sent it down" means: according to what it is upon of wisdom and miraculousness by which we have greatness, "upon some of the non-Arabs" who do not know anything of the language of the Arabs, whether from animals or humans. The plural of 'A'jam is 'A'jam', which refers to one who does not articulate and in whose tongue there is a foreignness. The non-Arab is like him with an added emphasis for the increase of the [Yaa] of the attribution.