(All) people are a single nation; so Allah raised prophets as bearers of good news and as warners, and He revealed with them the Book with truth, that it might judge between people in that in which they differed; and none but the very people who were given it differed about it after clear arguments had come to them, revolting among themselves; so Allah has guided by His will those who believe to the truth about which they differed and Allah guides whom He pleases to the right path.

And you were not on this side of the mountain when We called, but a mercy from your Lord that you may warn a people to whom no warner came before you, that they may be mindful.

Or do they say: He has forged it? Nay! it is the truth from your Lord that you may warn a people to whom no warner has come before you, that they may follow the right direction.

Surely We sent Nuh to his people, saying: Warn your people before there come upon them a painful chastisement.