Allah challenges people in several places in the Quran to produce another Surah (Chapter) like that of the Quran. During the time of Prophet Mohammad (peace be upon him), people were very much into poetry and eloquent writings. Linguistics was one of the favourite subjects and anybody who has proved themselves to be a good Orator was bound to be respected. The Quran was revealed during those times to Prophet Mohammad (peace be upon him) as a guide to humanity. Remember that Prophet Mohammad (peace be upon him) did not know how to read or write. This fact has been documented throughout history.

The challenge from God occurs in five different places in the Quran. Here are the relevant verses in the order that they were revealed by God:

“And if you (Arab pagans, Jews, and Christians) are in doubt concerning that which We have sent down (i.e. the Quran) to Our servant (Muhammad), then produce a chapter the like thereof and call your witnesses (supporters and helpers) besides God, if you are truthful. But if you do it not, and you can never do it, then fear the Fire (Hell) whose fuel is men and stones, prepared for the disbelievers.” (Quran 2:23-24, emphasis added)

“Or do they say, ‘He (Muhammad) has forged it?’ Say, ‘Bring then a chapter like unto it, and call upon whomsoever you can, besides God, if you are truthful!’” (Quran 10:38)

“Or do they say, ‘He (Muhammad) forged it.’  Say, ‘Bring you then ten forged chapters like unto it, and call whomsoever you can, other than God (to your help), if you speak the truth.’” (Quran 11:13)

“Say (to the people), ‘If all of humankind and jinns were together to produce the like of this Quran, they could not produce the like thereof, even if they helped one another.’” (Quran 17:88)

“Or do they say, ‘He (Muhammad) has forged it?’ Nay!  They believe not!  Let them then produce a recital like unto it if they are truthful.” (Quran 52:33-34)

In sum, if anyone still has any doubt about the Quran, let him rise to this challenge.

A- The first miracle/challenge of the Quran is the scientific miracle. In lots of places in the Quran, several scientific facts are mentioned. These facts could not have been found during that time since people simply did not have the knowledge or resources to do so.

B-I have read that the second miracle/challenge of the Quran is it’s linguistic design.

(1) Each word that is used in its precise place and cannot be moved or exchanged for a close synonym without its beauty or meaning being loss.

(2) The Quran has a unique sentence structure and rhythm that sets it apart from both prose and poetry, sometimes resembling one more than the other but never being completely one or the other.

(3) The sentences use the smallest number of words without losing any necessary meaning. In other words, they are concise, which adds to their beauty, while at the same time they convey all that needs to be conveyed.

(4) There is a perfect balance as well as a consistency in style between emotional and intellectual passages of the Quran

C-The Quran is filled with Mathematical patterns.

D-The Quran is filled with prophecies.

That is all I have found yet. I believe the challenge to produce another such Chapter is still open so people are most welcome to take a dig at it.

Resources:

1- The Miraculous Quran, Chapter 11 of 11.

URL=http://www.islamhouse.com/files/en/ih_articles/en_QuranChallengeforHumanity.pdf]

2-Miracles of the Quran.com

[URL=http://www.miraclesofthequran.com]

Later days

Take care