And if you are in doubt about what We have revealed (the Quran) to Our worshiper (Muhammad ), then produce a chapter like it, and call your witnesses (supporters and helpers) besides God if you are truthful. And if you do not do it, and you can never do it, then fear the Fire (Hell) whose fuel is men and stones. It has been prepared for disbelievers. And give good news (O Muhammad) to those who believe and do good deeds that for them are gardens (Paradise) in which rivers flow.... (Quran, 2:23-25)
Ever since the Quran was revealed, fourteen centuries ago, no one has been able to produce a single chapter like the chapters of the Quran in their beauty, eloquence, splendor, wise legislation, true information, true prophecy, and other perfect attributes. Also, note that the smallest chapter in the Quran (Chapter 108) is only ten words, yet no one has ever been able to meet this challenge, then or today.
Some of the disbelieving Arabs who were enemies of the Prophet Muhammad tried to meet this challenge to prove that Muhammad was not a true prophet, but they failed to do so. This failure was despite the fact that the Quran was revealed in their own language and dialect and that the Arabs at the time of Muhammad were a very eloquent people who used to compose beautiful and excellent poetry, still read and appreciated today.
source : sibtayn
