The challenge of Quran

Allah the Exalted has challenged Arabs and non-Arabs to
produce a Qur'an similar to the Divine one. The challenge was
reduced to ten Chapters, and yet they failed to do so. Finally,
Allah challenged them to produce a single Chapter
comparable to any of His. Although the Arabs at that time
were the masters of eloquence and rhetoric, they were
incapable of taking up the challenge. They realized that it
could never be from other than Allah , the Lord of the
worlds.
The difference between the miracles of the previous
Messengers, miracles proving their veracity, and that of
Allah's Messenger(pbuh) , is that theirs were effective during
their lifetime, whereas his miracle of the Qur'an has
remained and will remain effective, everlasting, and
unchallenged until the Day of Resurrection.