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See note [100] above.
Although the Arabian contemporaries of the Prophet were, naturally, the first to whom his revelation was conveyed - a fact that gave a particular weight to the manner in which they responded to it - the Qur'anic message as such is addressed to all mankind (see in this connection, in particular, 7:158 and 21:107 , as well as the corresponding notes).
I.e., everything that pertains to the knowledge of good and evil, in both the individual and social senses of these terms. - Regarding my rendering of nazzalna, it should be borne in mind that this particular grammatical form is often used in the Qur'an to bring out the fact that it was revealed gradually ("step by step") over a considerable period of time, and not in one piece.
To the thought expressed in xvi. 84 above, is added another detail here. Not only will there be witnesses from Peoples, but the witnesses will be men from amongst the Peoples themselves, men of their own kith and kin, who understood them and explained Allah's Message in their own language. The Prophet Muhammad will be witness against all those who rejected the Message he brought. For those who believe in him of (all races and peoples), the Book which he brought will be an explanation, a guide, a mercy and a Gospel.