“If we had a reminder as had the men of old (before the coming of Prophet Muhammad SAW as a Messenger of Allah).
“We would have indeed been the chosen slaves of Allah (true believers of Islamic Monotheism)!”
But (now that the Quran has come) they disbelieve therein (i.e. in the Quran and in Prophet Muhammad SAW , and all that which he brought, the Divine Revelation), so they will come to know!
Chapter 37 As-Șāffāt : Verses 167-170
The Quraysh wished that They could have a Reminder as had the Men of old
(And indeed they used to say: “If we had a reminder as had the men of old, we would have indeed been the chosen servants of Allah!”) means, `they used to wish — before you, O Muhammad, came to them — that they would have someone to remind them about Allah and what happened in earlier times, and to bring them the Book of Allah.’ This is like the Ayat:
(And they swore by Allah their most binding oath that if a warner came to them, they would be more guided than any of the nations (before them); yet when a warner came to them, it increased in them naught but flight (from the truth).) (35:42), and
(Lest you should say: “The Book was sent down only to two sects before us, and for our part, we were in fact unaware of what they studied.” Or lest you should say: “If only the Book had been sent down to us, we would surely have been better guided than they.” So now has come unto you a clear proof from your Lord, and a form of guidance and a mercy. Who then does more wrong than one who rejects the Ayat of Allah and turns away therefrom We shall requite those who turn away from Our Ayat with an evil torment, because of their turning away.) (6:156-157) Allah says here:
(But they disbelieve therein, so they will come to know!) This is a definite and stern threat because of their disbelief in their Lord and their rejection of His Messenger .