Chapter 13: The miracle and challenge of the Qur'an

e shall show them Our signs on the horizons and within themselves until it will become clear to them that it is the Truth. Does it not suffice that your Lord is Witness over all things?"
The noble Qur'an, Fussilat(41):53.

Muslims are taught that throughout the ages, Allah Almighty has sent a prophet to every nation as a warner and a bearer of glad tidings.

"Verily! We have sent you (O Muhammad) with the Truth, a bearer of glad tidings and a warner; and there is not a nation but a warner has passed among them,"
The noble Qur'an, Fatir(35):24.

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http://wings.buffalo.edu/sa/muslim/library/jesus-say/ch13.html